diff --git a/BUILD b/BUILD
index fe147991965e8a590292d863f671f7ad639172f3..fe4b76636d8e3d0cfdbf13b23908d33d07bfd0e8 100644
--- a/BUILD
+++ b/BUILD
@@ -295,7 +295,6 @@ cc_library(
     "src/core/ext/client_config/subchannel_call_holder.h",
     "src/core/ext/client_config/subchannel_index.h",
     "src/core/ext/client_config/uri_parser.h",
-    "third_party/objective_c/Cronet/cronet_c_for_grpc.h",
     "src/core/ext/lb_policy/grpclb/load_balancer_api.h",
     "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h",
     "src/core/ext/load_reporting/load_reporting.h",
@@ -462,9 +461,6 @@ cc_library(
     "src/core/ext/client_config/uri_parser.c",
     "src/core/ext/transport/chttp2/server/insecure/server_chttp2.c",
     "src/core/ext/transport/chttp2/client/insecure/channel_create.c",
-    "src/core/ext/transport/cronet/client/secure/cronet_channel_create.c",
-    "src/core/ext/transport/cronet/transport/cronet_api_dummy.c",
-    "src/core/ext/transport/cronet/transport/cronet_transport.c",
     "src/core/ext/lb_policy/grpclb/load_balancer_api.c",
     "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c",
     "src/core/ext/lb_policy/pick_first/pick_first.c",
@@ -512,7 +508,6 @@ cc_library(
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
     "include/grpc/impl/codegen/time.h",
-    "include/grpc/grpc_cronet.h",
     "include/grpc/grpc_security.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/census.h",
@@ -534,6 +529,344 @@ cc_library(
 
 
 
+cc_library(
+  name = "grpc_cronet",
+  srcs = [
+    "src/core/lib/channel/channel_args.h",
+    "src/core/lib/channel/channel_stack.h",
+    "src/core/lib/channel/channel_stack_builder.h",
+    "src/core/lib/channel/compress_filter.h",
+    "src/core/lib/channel/connected_channel.h",
+    "src/core/lib/channel/context.h",
+    "src/core/lib/channel/http_client_filter.h",
+    "src/core/lib/channel/http_server_filter.h",
+    "src/core/lib/compression/algorithm_metadata.h",
+    "src/core/lib/compression/message_compress.h",
+    "src/core/lib/debug/trace.h",
+    "src/core/lib/http/format_request.h",
+    "src/core/lib/http/httpcli.h",
+    "src/core/lib/http/parser.h",
+    "src/core/lib/iomgr/closure.h",
+    "src/core/lib/iomgr/endpoint.h",
+    "src/core/lib/iomgr/endpoint_pair.h",
+    "src/core/lib/iomgr/ev_poll_and_epoll_posix.h",
+    "src/core/lib/iomgr/ev_poll_posix.h",
+    "src/core/lib/iomgr/ev_posix.h",
+    "src/core/lib/iomgr/exec_ctx.h",
+    "src/core/lib/iomgr/executor.h",
+    "src/core/lib/iomgr/iocp_windows.h",
+    "src/core/lib/iomgr/iomgr.h",
+    "src/core/lib/iomgr/iomgr_internal.h",
+    "src/core/lib/iomgr/iomgr_posix.h",
+    "src/core/lib/iomgr/pollset.h",
+    "src/core/lib/iomgr/pollset_set.h",
+    "src/core/lib/iomgr/pollset_set_windows.h",
+    "src/core/lib/iomgr/pollset_windows.h",
+    "src/core/lib/iomgr/resolve_address.h",
+    "src/core/lib/iomgr/sockaddr.h",
+    "src/core/lib/iomgr/sockaddr_posix.h",
+    "src/core/lib/iomgr/sockaddr_utils.h",
+    "src/core/lib/iomgr/sockaddr_windows.h",
+    "src/core/lib/iomgr/socket_utils_posix.h",
+    "src/core/lib/iomgr/socket_windows.h",
+    "src/core/lib/iomgr/tcp_client.h",
+    "src/core/lib/iomgr/tcp_posix.h",
+    "src/core/lib/iomgr/tcp_server.h",
+    "src/core/lib/iomgr/tcp_windows.h",
+    "src/core/lib/iomgr/time_averaged_stats.h",
+    "src/core/lib/iomgr/timer.h",
+    "src/core/lib/iomgr/timer_heap.h",
+    "src/core/lib/iomgr/udp_server.h",
+    "src/core/lib/iomgr/unix_sockets_posix.h",
+    "src/core/lib/iomgr/wakeup_fd_pipe.h",
+    "src/core/lib/iomgr/wakeup_fd_posix.h",
+    "src/core/lib/iomgr/workqueue.h",
+    "src/core/lib/iomgr/workqueue_posix.h",
+    "src/core/lib/iomgr/workqueue_windows.h",
+    "src/core/lib/json/json.h",
+    "src/core/lib/json/json_common.h",
+    "src/core/lib/json/json_reader.h",
+    "src/core/lib/json/json_writer.h",
+    "src/core/lib/surface/api_trace.h",
+    "src/core/lib/surface/call.h",
+    "src/core/lib/surface/call_test_only.h",
+    "src/core/lib/surface/channel.h",
+    "src/core/lib/surface/channel_init.h",
+    "src/core/lib/surface/channel_stack_type.h",
+    "src/core/lib/surface/completion_queue.h",
+    "src/core/lib/surface/event_string.h",
+    "src/core/lib/surface/init.h",
+    "src/core/lib/surface/lame_client.h",
+    "src/core/lib/surface/server.h",
+    "src/core/lib/surface/surface_trace.h",
+    "src/core/lib/transport/byte_stream.h",
+    "src/core/lib/transport/connectivity_state.h",
+    "src/core/lib/transport/metadata.h",
+    "src/core/lib/transport/metadata_batch.h",
+    "src/core/lib/transport/static_metadata.h",
+    "src/core/lib/transport/transport.h",
+    "src/core/lib/transport/transport_impl.h",
+    "third_party/objective_c/Cronet/cronet_c_for_grpc.h",
+    "src/core/ext/transport/chttp2/transport/bin_encoder.h",
+    "src/core/ext/transport/chttp2/transport/chttp2_transport.h",
+    "src/core/ext/transport/chttp2/transport/frame.h",
+    "src/core/ext/transport/chttp2/transport/frame_data.h",
+    "src/core/ext/transport/chttp2/transport/frame_goaway.h",
+    "src/core/ext/transport/chttp2/transport/frame_ping.h",
+    "src/core/ext/transport/chttp2/transport/frame_rst_stream.h",
+    "src/core/ext/transport/chttp2/transport/frame_settings.h",
+    "src/core/ext/transport/chttp2/transport/frame_window_update.h",
+    "src/core/ext/transport/chttp2/transport/hpack_encoder.h",
+    "src/core/ext/transport/chttp2/transport/hpack_parser.h",
+    "src/core/ext/transport/chttp2/transport/hpack_table.h",
+    "src/core/ext/transport/chttp2/transport/http2_errors.h",
+    "src/core/ext/transport/chttp2/transport/huffsyms.h",
+    "src/core/ext/transport/chttp2/transport/incoming_metadata.h",
+    "src/core/ext/transport/chttp2/transport/internal.h",
+    "src/core/ext/transport/chttp2/transport/status_conversion.h",
+    "src/core/ext/transport/chttp2/transport/stream_map.h",
+    "src/core/ext/transport/chttp2/transport/timeout_encoding.h",
+    "src/core/ext/transport/chttp2/transport/varint.h",
+    "src/core/ext/transport/chttp2/alpn/alpn.h",
+    "src/core/ext/client_config/client_channel.h",
+    "src/core/ext/client_config/client_channel_factory.h",
+    "src/core/ext/client_config/client_config.h",
+    "src/core/ext/client_config/connector.h",
+    "src/core/ext/client_config/initial_connect_string.h",
+    "src/core/ext/client_config/lb_policy.h",
+    "src/core/ext/client_config/lb_policy_factory.h",
+    "src/core/ext/client_config/lb_policy_registry.h",
+    "src/core/ext/client_config/parse_address.h",
+    "src/core/ext/client_config/resolver.h",
+    "src/core/ext/client_config/resolver_factory.h",
+    "src/core/ext/client_config/resolver_registry.h",
+    "src/core/ext/client_config/subchannel.h",
+    "src/core/ext/client_config/subchannel_call_holder.h",
+    "src/core/ext/client_config/subchannel_index.h",
+    "src/core/ext/client_config/uri_parser.h",
+    "src/core/lib/security/context/security_context.h",
+    "src/core/lib/security/credentials/composite/composite_credentials.h",
+    "src/core/lib/security/credentials/credentials.h",
+    "src/core/lib/security/credentials/fake/fake_credentials.h",
+    "src/core/lib/security/credentials/google_default/google_default_credentials.h",
+    "src/core/lib/security/credentials/iam/iam_credentials.h",
+    "src/core/lib/security/credentials/jwt/json_token.h",
+    "src/core/lib/security/credentials/jwt/jwt_credentials.h",
+    "src/core/lib/security/credentials/jwt/jwt_verifier.h",
+    "src/core/lib/security/credentials/oauth2/oauth2_credentials.h",
+    "src/core/lib/security/credentials/plugin/plugin_credentials.h",
+    "src/core/lib/security/credentials/ssl/ssl_credentials.h",
+    "src/core/lib/security/transport/auth_filters.h",
+    "src/core/lib/security/transport/handshake.h",
+    "src/core/lib/security/transport/secure_endpoint.h",
+    "src/core/lib/security/transport/security_connector.h",
+    "src/core/lib/security/util/b64.h",
+    "src/core/lib/security/util/json_util.h",
+    "src/core/lib/tsi/fake_transport_security.h",
+    "src/core/lib/tsi/ssl_transport_security.h",
+    "src/core/lib/tsi/ssl_types.h",
+    "src/core/lib/tsi/transport_security.h",
+    "src/core/lib/tsi/transport_security_interface.h",
+    "src/core/lib/surface/init.c",
+    "src/core/lib/channel/channel_args.c",
+    "src/core/lib/channel/channel_stack.c",
+    "src/core/lib/channel/channel_stack_builder.c",
+    "src/core/lib/channel/compress_filter.c",
+    "src/core/lib/channel/connected_channel.c",
+    "src/core/lib/channel/http_client_filter.c",
+    "src/core/lib/channel/http_server_filter.c",
+    "src/core/lib/compression/compression_algorithm.c",
+    "src/core/lib/compression/message_compress.c",
+    "src/core/lib/debug/trace.c",
+    "src/core/lib/http/format_request.c",
+    "src/core/lib/http/httpcli.c",
+    "src/core/lib/http/parser.c",
+    "src/core/lib/iomgr/closure.c",
+    "src/core/lib/iomgr/endpoint.c",
+    "src/core/lib/iomgr/endpoint_pair_posix.c",
+    "src/core/lib/iomgr/endpoint_pair_windows.c",
+    "src/core/lib/iomgr/ev_poll_and_epoll_posix.c",
+    "src/core/lib/iomgr/ev_poll_posix.c",
+    "src/core/lib/iomgr/ev_posix.c",
+    "src/core/lib/iomgr/exec_ctx.c",
+    "src/core/lib/iomgr/executor.c",
+    "src/core/lib/iomgr/iocp_windows.c",
+    "src/core/lib/iomgr/iomgr.c",
+    "src/core/lib/iomgr/iomgr_posix.c",
+    "src/core/lib/iomgr/iomgr_windows.c",
+    "src/core/lib/iomgr/pollset_set_windows.c",
+    "src/core/lib/iomgr/pollset_windows.c",
+    "src/core/lib/iomgr/resolve_address_posix.c",
+    "src/core/lib/iomgr/resolve_address_windows.c",
+    "src/core/lib/iomgr/sockaddr_utils.c",
+    "src/core/lib/iomgr/socket_utils_common_posix.c",
+    "src/core/lib/iomgr/socket_utils_linux.c",
+    "src/core/lib/iomgr/socket_utils_posix.c",
+    "src/core/lib/iomgr/socket_windows.c",
+    "src/core/lib/iomgr/tcp_client_posix.c",
+    "src/core/lib/iomgr/tcp_client_windows.c",
+    "src/core/lib/iomgr/tcp_posix.c",
+    "src/core/lib/iomgr/tcp_server_posix.c",
+    "src/core/lib/iomgr/tcp_server_windows.c",
+    "src/core/lib/iomgr/tcp_windows.c",
+    "src/core/lib/iomgr/time_averaged_stats.c",
+    "src/core/lib/iomgr/timer.c",
+    "src/core/lib/iomgr/timer_heap.c",
+    "src/core/lib/iomgr/udp_server.c",
+    "src/core/lib/iomgr/unix_sockets_posix.c",
+    "src/core/lib/iomgr/unix_sockets_posix_noop.c",
+    "src/core/lib/iomgr/wakeup_fd_eventfd.c",
+    "src/core/lib/iomgr/wakeup_fd_nospecial.c",
+    "src/core/lib/iomgr/wakeup_fd_pipe.c",
+    "src/core/lib/iomgr/wakeup_fd_posix.c",
+    "src/core/lib/iomgr/workqueue_posix.c",
+    "src/core/lib/iomgr/workqueue_windows.c",
+    "src/core/lib/json/json.c",
+    "src/core/lib/json/json_reader.c",
+    "src/core/lib/json/json_string.c",
+    "src/core/lib/json/json_writer.c",
+    "src/core/lib/surface/alarm.c",
+    "src/core/lib/surface/api_trace.c",
+    "src/core/lib/surface/byte_buffer.c",
+    "src/core/lib/surface/byte_buffer_reader.c",
+    "src/core/lib/surface/call.c",
+    "src/core/lib/surface/call_details.c",
+    "src/core/lib/surface/call_log_batch.c",
+    "src/core/lib/surface/channel.c",
+    "src/core/lib/surface/channel_init.c",
+    "src/core/lib/surface/channel_ping.c",
+    "src/core/lib/surface/channel_stack_type.c",
+    "src/core/lib/surface/completion_queue.c",
+    "src/core/lib/surface/event_string.c",
+    "src/core/lib/surface/lame_client.c",
+    "src/core/lib/surface/metadata_array.c",
+    "src/core/lib/surface/server.c",
+    "src/core/lib/surface/validate_metadata.c",
+    "src/core/lib/surface/version.c",
+    "src/core/lib/transport/byte_stream.c",
+    "src/core/lib/transport/connectivity_state.c",
+    "src/core/lib/transport/metadata.c",
+    "src/core/lib/transport/metadata_batch.c",
+    "src/core/lib/transport/static_metadata.c",
+    "src/core/lib/transport/transport.c",
+    "src/core/lib/transport/transport_op_string.c",
+    "src/core/ext/transport/cronet/client/secure/cronet_channel_create.c",
+    "src/core/ext/transport/cronet/transport/cronet_api_dummy.c",
+    "src/core/ext/transport/cronet/transport/cronet_transport.c",
+    "src/core/ext/transport/chttp2/client/secure/secure_channel_create.c",
+    "src/core/ext/transport/chttp2/transport/bin_encoder.c",
+    "src/core/ext/transport/chttp2/transport/chttp2_plugin.c",
+    "src/core/ext/transport/chttp2/transport/chttp2_transport.c",
+    "src/core/ext/transport/chttp2/transport/frame_data.c",
+    "src/core/ext/transport/chttp2/transport/frame_goaway.c",
+    "src/core/ext/transport/chttp2/transport/frame_ping.c",
+    "src/core/ext/transport/chttp2/transport/frame_rst_stream.c",
+    "src/core/ext/transport/chttp2/transport/frame_settings.c",
+    "src/core/ext/transport/chttp2/transport/frame_window_update.c",
+    "src/core/ext/transport/chttp2/transport/hpack_encoder.c",
+    "src/core/ext/transport/chttp2/transport/hpack_parser.c",
+    "src/core/ext/transport/chttp2/transport/hpack_table.c",
+    "src/core/ext/transport/chttp2/transport/huffsyms.c",
+    "src/core/ext/transport/chttp2/transport/incoming_metadata.c",
+    "src/core/ext/transport/chttp2/transport/parsing.c",
+    "src/core/ext/transport/chttp2/transport/status_conversion.c",
+    "src/core/ext/transport/chttp2/transport/stream_lists.c",
+    "src/core/ext/transport/chttp2/transport/stream_map.c",
+    "src/core/ext/transport/chttp2/transport/timeout_encoding.c",
+    "src/core/ext/transport/chttp2/transport/varint.c",
+    "src/core/ext/transport/chttp2/transport/writing.c",
+    "src/core/ext/transport/chttp2/alpn/alpn.c",
+    "src/core/ext/client_config/channel_connectivity.c",
+    "src/core/ext/client_config/client_channel.c",
+    "src/core/ext/client_config/client_channel_factory.c",
+    "src/core/ext/client_config/client_config.c",
+    "src/core/ext/client_config/client_config_plugin.c",
+    "src/core/ext/client_config/connector.c",
+    "src/core/ext/client_config/default_initial_connect_string.c",
+    "src/core/ext/client_config/initial_connect_string.c",
+    "src/core/ext/client_config/lb_policy.c",
+    "src/core/ext/client_config/lb_policy_factory.c",
+    "src/core/ext/client_config/lb_policy_registry.c",
+    "src/core/ext/client_config/parse_address.c",
+    "src/core/ext/client_config/resolver.c",
+    "src/core/ext/client_config/resolver_factory.c",
+    "src/core/ext/client_config/resolver_registry.c",
+    "src/core/ext/client_config/subchannel.c",
+    "src/core/ext/client_config/subchannel_call_holder.c",
+    "src/core/ext/client_config/subchannel_index.c",
+    "src/core/ext/client_config/uri_parser.c",
+    "src/core/lib/http/httpcli_security_connector.c",
+    "src/core/lib/security/context/security_context.c",
+    "src/core/lib/security/credentials/composite/composite_credentials.c",
+    "src/core/lib/security/credentials/credentials.c",
+    "src/core/lib/security/credentials/credentials_metadata.c",
+    "src/core/lib/security/credentials/fake/fake_credentials.c",
+    "src/core/lib/security/credentials/google_default/credentials_posix.c",
+    "src/core/lib/security/credentials/google_default/credentials_windows.c",
+    "src/core/lib/security/credentials/google_default/google_default_credentials.c",
+    "src/core/lib/security/credentials/iam/iam_credentials.c",
+    "src/core/lib/security/credentials/jwt/json_token.c",
+    "src/core/lib/security/credentials/jwt/jwt_credentials.c",
+    "src/core/lib/security/credentials/jwt/jwt_verifier.c",
+    "src/core/lib/security/credentials/oauth2/oauth2_credentials.c",
+    "src/core/lib/security/credentials/plugin/plugin_credentials.c",
+    "src/core/lib/security/credentials/ssl/ssl_credentials.c",
+    "src/core/lib/security/transport/client_auth_filter.c",
+    "src/core/lib/security/transport/handshake.c",
+    "src/core/lib/security/transport/secure_endpoint.c",
+    "src/core/lib/security/transport/security_connector.c",
+    "src/core/lib/security/transport/server_auth_filter.c",
+    "src/core/lib/security/util/b64.c",
+    "src/core/lib/security/util/json_util.c",
+    "src/core/lib/surface/init_secure.c",
+    "src/core/lib/tsi/fake_transport_security.c",
+    "src/core/lib/tsi/ssl_transport_security.c",
+    "src/core/lib/tsi/transport_security.c",
+    "src/core/plugin_registry/grpc_cronet_plugin_registry.c",
+  ],
+  hdrs = [
+    "include/grpc/byte_buffer.h",
+    "include/grpc/byte_buffer_reader.h",
+    "include/grpc/compression.h",
+    "include/grpc/grpc.h",
+    "include/grpc/status.h",
+    "include/grpc/impl/codegen/byte_buffer.h",
+    "include/grpc/impl/codegen/byte_buffer_reader.h",
+    "include/grpc/impl/codegen/compression_types.h",
+    "include/grpc/impl/codegen/connectivity_state.h",
+    "include/grpc/impl/codegen/grpc_types.h",
+    "include/grpc/impl/codegen/propagation_bits.h",
+    "include/grpc/impl/codegen/status.h",
+    "include/grpc/impl/codegen/alloc.h",
+    "include/grpc/impl/codegen/atm.h",
+    "include/grpc/impl/codegen/atm_gcc_atomic.h",
+    "include/grpc/impl/codegen/atm_gcc_sync.h",
+    "include/grpc/impl/codegen/atm_windows.h",
+    "include/grpc/impl/codegen/log.h",
+    "include/grpc/impl/codegen/port_platform.h",
+    "include/grpc/impl/codegen/slice.h",
+    "include/grpc/impl/codegen/slice_buffer.h",
+    "include/grpc/impl/codegen/sync.h",
+    "include/grpc/impl/codegen/sync_generic.h",
+    "include/grpc/impl/codegen/sync_posix.h",
+    "include/grpc/impl/codegen/sync_windows.h",
+    "include/grpc/impl/codegen/time.h",
+    "include/grpc/grpc_cronet.h",
+    "include/grpc/grpc_security.h",
+    "include/grpc/grpc_security_constants.h",
+  ],
+  includes = [
+    "include",
+    ".",
+  ],
+  deps = [
+    "//external:libssl",
+    ":gpr",
+  ],
+)
+
+
+
 cc_library(
   name = "grpc_unsecure",
   srcs = [
@@ -1511,9 +1844,6 @@ objc_library(
     "src/core/ext/client_config/uri_parser.c",
     "src/core/ext/transport/chttp2/server/insecure/server_chttp2.c",
     "src/core/ext/transport/chttp2/client/insecure/channel_create.c",
-    "src/core/ext/transport/cronet/client/secure/cronet_channel_create.c",
-    "src/core/ext/transport/cronet/transport/cronet_api_dummy.c",
-    "src/core/ext/transport/cronet/transport/cronet_transport.c",
     "src/core/ext/lb_policy/grpclb/load_balancer_api.c",
     "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c",
     "src/core/ext/lb_policy/pick_first/pick_first.c",
@@ -1561,7 +1891,6 @@ objc_library(
     "include/grpc/impl/codegen/sync_posix.h",
     "include/grpc/impl/codegen/sync_windows.h",
     "include/grpc/impl/codegen/time.h",
-    "include/grpc/grpc_cronet.h",
     "include/grpc/grpc_security.h",
     "include/grpc/grpc_security_constants.h",
     "include/grpc/census.h",
@@ -1699,7 +2028,6 @@ objc_library(
     "src/core/ext/client_config/subchannel_call_holder.h",
     "src/core/ext/client_config/subchannel_index.h",
     "src/core/ext/client_config/uri_parser.h",
-    "third_party/objective_c/Cronet/cronet_c_for_grpc.h",
     "src/core/ext/lb_policy/grpclb/load_balancer_api.h",
     "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h",
     "src/core/ext/load_reporting/load_reporting.h",
diff --git a/Makefile b/Makefile
index bfc54a439a680c2039a0d23d6a594efc8483640a..81f0a605d2be7ca184d51ea72279f8106777ff0f 100644
--- a/Makefile
+++ b/Makefile
@@ -1163,14 +1163,14 @@ $(LIBDIR)/$(CONFIG)/protobuf/libprotobuf.a: third_party/protobuf/configure
 
 static: static_c static_cxx
 
-static_c: pc_c pc_c_unsecure cache.mk pc_c_zookeeper $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a static_zookeeper_libs
+static_c: pc_c pc_c_unsecure cache.mk pc_c_zookeeper $(LIBDIR)/$(CONFIG)/libgpr.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a static_zookeeper_libs
 
 
 static_cxx: pc_cxx pc_cxx_unsecure cache.mk  $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc++_unsecure.a
 
 shared: shared_c shared_cxx
 
-shared_c: pc_c pc_c_unsecure cache.mk pc_c_zookeeper $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)gpr$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc_unsecure$(SHARED_VERSION).$(SHARED_EXT) shared_zookeeper_libs
+shared_c: pc_c pc_c_unsecure cache.mk pc_c_zookeeper $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)gpr$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc_unsecure$(SHARED_VERSION).$(SHARED_EXT) shared_zookeeper_libs
 
 shared_cxx: pc_cxx pc_cxx_unsecure cache.mk $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc++$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc++_unsecure$(SHARED_VERSION).$(SHARED_EXT)
 
@@ -1791,6 +1791,8 @@ ifeq ($(CONFIG),opt)
 	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[STRIP]   Stripping libgrpc.a"
 	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/libgrpc.a
+	$(E) "[STRIP]   Stripping libgrpc_cronet.a"
+	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a
 	$(E) "[STRIP]   Stripping libgrpc_unsecure.a"
 	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a
 ifeq ($(HAS_ZOOKEEPER),true)
@@ -1813,6 +1815,8 @@ ifeq ($(CONFIG),opt)
 	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)gpr$(SHARED_VERSION).$(SHARED_EXT)
 	$(E) "[STRIP]   Stripping $(SHARED_PREFIX)grpc$(SHARED_VERSION).$(SHARED_EXT)"
 	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc$(SHARED_VERSION).$(SHARED_EXT)
+	$(E) "[STRIP]   Stripping $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT)"
+	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT)
 	$(E) "[STRIP]   Stripping $(SHARED_PREFIX)grpc_unsecure$(SHARED_VERSION).$(SHARED_EXT)"
 	$(Q) $(STRIP) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc_unsecure$(SHARED_VERSION).$(SHARED_EXT)
 ifeq ($(HAS_ZOOKEEPER),true)
@@ -2123,6 +2127,9 @@ install-static_c: static_c strip-static_c install-pkg-config_c
 	$(E) "[INSTALL] Installing libgrpc.a"
 	$(Q) $(INSTALL) -d $(prefix)/lib
 	$(Q) $(INSTALL) $(LIBDIR)/$(CONFIG)/libgrpc.a $(prefix)/lib/libgrpc.a
+	$(E) "[INSTALL] Installing libgrpc_cronet.a"
+	$(Q) $(INSTALL) -d $(prefix)/lib
+	$(Q) $(INSTALL) $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a $(prefix)/lib/libgrpc_cronet.a
 	$(E) "[INSTALL] Installing libgrpc_unsecure.a"
 	$(Q) $(INSTALL) -d $(prefix)/lib
 	$(Q) $(INSTALL) $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(prefix)/lib/libgrpc_unsecure.a
@@ -2160,6 +2167,15 @@ ifeq ($(SYSTEM),MINGW32)
 else ifneq ($(SYSTEM),Darwin)
 	$(Q) ln -sf $(SHARED_PREFIX)grpc$(SHARED_VERSION).$(SHARED_EXT) $(prefix)/lib/libgrpc.so.0
 	$(Q) ln -sf $(SHARED_PREFIX)grpc$(SHARED_VERSION).$(SHARED_EXT) $(prefix)/lib/libgrpc.so
+endif
+	$(E) "[INSTALL] Installing $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT)"
+	$(Q) $(INSTALL) -d $(prefix)/lib
+	$(Q) $(INSTALL) $(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT) $(prefix)/lib/$(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT)
+ifeq ($(SYSTEM),MINGW32)
+	$(Q) $(INSTALL) $(LIBDIR)/$(CONFIG)/libgrpc_cronet-imp.a $(prefix)/lib/libgrpc_cronet-imp.a
+else ifneq ($(SYSTEM),Darwin)
+	$(Q) ln -sf $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT) $(prefix)/lib/libgrpc_cronet.so.0
+	$(Q) ln -sf $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT) $(prefix)/lib/libgrpc_cronet.so
 endif
 	$(E) "[INSTALL] Installing $(SHARED_PREFIX)grpc_unsecure$(SHARED_VERSION).$(SHARED_EXT)"
 	$(Q) $(INSTALL) -d $(prefix)/lib
@@ -2614,9 +2630,6 @@ LIBGRPC_SRC = \
     src/core/ext/client_config/uri_parser.c \
     src/core/ext/transport/chttp2/server/insecure/server_chttp2.c \
     src/core/ext/transport/chttp2/client/insecure/channel_create.c \
-    src/core/ext/transport/cronet/client/secure/cronet_channel_create.c \
-    src/core/ext/transport/cronet/transport/cronet_api_dummy.c \
-    src/core/ext/transport/cronet/transport/cronet_transport.c \
     src/core/ext/lb_policy/grpclb/load_balancer_api.c \
     src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c \
     third_party/nanopb/pb_common.c \
@@ -2667,7 +2680,6 @@ PUBLIC_HEADERS_C += \
     include/grpc/impl/codegen/sync_posix.h \
     include/grpc/impl/codegen/sync_windows.h \
     include/grpc/impl/codegen/time.h \
-    include/grpc/grpc_cronet.h \
     include/grpc/grpc_security.h \
     include/grpc/grpc_security_constants.h \
     include/grpc/census.h \
@@ -2724,6 +2736,247 @@ endif
 endif
 
 
+LIBGRPC_CRONET_SRC = \
+    src/core/lib/surface/init.c \
+    src/core/lib/channel/channel_args.c \
+    src/core/lib/channel/channel_stack.c \
+    src/core/lib/channel/channel_stack_builder.c \
+    src/core/lib/channel/compress_filter.c \
+    src/core/lib/channel/connected_channel.c \
+    src/core/lib/channel/http_client_filter.c \
+    src/core/lib/channel/http_server_filter.c \
+    src/core/lib/compression/compression_algorithm.c \
+    src/core/lib/compression/message_compress.c \
+    src/core/lib/debug/trace.c \
+    src/core/lib/http/format_request.c \
+    src/core/lib/http/httpcli.c \
+    src/core/lib/http/parser.c \
+    src/core/lib/iomgr/closure.c \
+    src/core/lib/iomgr/endpoint.c \
+    src/core/lib/iomgr/endpoint_pair_posix.c \
+    src/core/lib/iomgr/endpoint_pair_windows.c \
+    src/core/lib/iomgr/ev_poll_and_epoll_posix.c \
+    src/core/lib/iomgr/ev_poll_posix.c \
+    src/core/lib/iomgr/ev_posix.c \
+    src/core/lib/iomgr/exec_ctx.c \
+    src/core/lib/iomgr/executor.c \
+    src/core/lib/iomgr/iocp_windows.c \
+    src/core/lib/iomgr/iomgr.c \
+    src/core/lib/iomgr/iomgr_posix.c \
+    src/core/lib/iomgr/iomgr_windows.c \
+    src/core/lib/iomgr/pollset_set_windows.c \
+    src/core/lib/iomgr/pollset_windows.c \
+    src/core/lib/iomgr/resolve_address_posix.c \
+    src/core/lib/iomgr/resolve_address_windows.c \
+    src/core/lib/iomgr/sockaddr_utils.c \
+    src/core/lib/iomgr/socket_utils_common_posix.c \
+    src/core/lib/iomgr/socket_utils_linux.c \
+    src/core/lib/iomgr/socket_utils_posix.c \
+    src/core/lib/iomgr/socket_windows.c \
+    src/core/lib/iomgr/tcp_client_posix.c \
+    src/core/lib/iomgr/tcp_client_windows.c \
+    src/core/lib/iomgr/tcp_posix.c \
+    src/core/lib/iomgr/tcp_server_posix.c \
+    src/core/lib/iomgr/tcp_server_windows.c \
+    src/core/lib/iomgr/tcp_windows.c \
+    src/core/lib/iomgr/time_averaged_stats.c \
+    src/core/lib/iomgr/timer.c \
+    src/core/lib/iomgr/timer_heap.c \
+    src/core/lib/iomgr/udp_server.c \
+    src/core/lib/iomgr/unix_sockets_posix.c \
+    src/core/lib/iomgr/unix_sockets_posix_noop.c \
+    src/core/lib/iomgr/wakeup_fd_eventfd.c \
+    src/core/lib/iomgr/wakeup_fd_nospecial.c \
+    src/core/lib/iomgr/wakeup_fd_pipe.c \
+    src/core/lib/iomgr/wakeup_fd_posix.c \
+    src/core/lib/iomgr/workqueue_posix.c \
+    src/core/lib/iomgr/workqueue_windows.c \
+    src/core/lib/json/json.c \
+    src/core/lib/json/json_reader.c \
+    src/core/lib/json/json_string.c \
+    src/core/lib/json/json_writer.c \
+    src/core/lib/surface/alarm.c \
+    src/core/lib/surface/api_trace.c \
+    src/core/lib/surface/byte_buffer.c \
+    src/core/lib/surface/byte_buffer_reader.c \
+    src/core/lib/surface/call.c \
+    src/core/lib/surface/call_details.c \
+    src/core/lib/surface/call_log_batch.c \
+    src/core/lib/surface/channel.c \
+    src/core/lib/surface/channel_init.c \
+    src/core/lib/surface/channel_ping.c \
+    src/core/lib/surface/channel_stack_type.c \
+    src/core/lib/surface/completion_queue.c \
+    src/core/lib/surface/event_string.c \
+    src/core/lib/surface/lame_client.c \
+    src/core/lib/surface/metadata_array.c \
+    src/core/lib/surface/server.c \
+    src/core/lib/surface/validate_metadata.c \
+    src/core/lib/surface/version.c \
+    src/core/lib/transport/byte_stream.c \
+    src/core/lib/transport/connectivity_state.c \
+    src/core/lib/transport/metadata.c \
+    src/core/lib/transport/metadata_batch.c \
+    src/core/lib/transport/static_metadata.c \
+    src/core/lib/transport/transport.c \
+    src/core/lib/transport/transport_op_string.c \
+    src/core/ext/transport/cronet/client/secure/cronet_channel_create.c \
+    src/core/ext/transport/cronet/transport/cronet_api_dummy.c \
+    src/core/ext/transport/cronet/transport/cronet_transport.c \
+    src/core/ext/transport/chttp2/client/secure/secure_channel_create.c \
+    src/core/ext/transport/chttp2/transport/bin_encoder.c \
+    src/core/ext/transport/chttp2/transport/chttp2_plugin.c \
+    src/core/ext/transport/chttp2/transport/chttp2_transport.c \
+    src/core/ext/transport/chttp2/transport/frame_data.c \
+    src/core/ext/transport/chttp2/transport/frame_goaway.c \
+    src/core/ext/transport/chttp2/transport/frame_ping.c \
+    src/core/ext/transport/chttp2/transport/frame_rst_stream.c \
+    src/core/ext/transport/chttp2/transport/frame_settings.c \
+    src/core/ext/transport/chttp2/transport/frame_window_update.c \
+    src/core/ext/transport/chttp2/transport/hpack_encoder.c \
+    src/core/ext/transport/chttp2/transport/hpack_parser.c \
+    src/core/ext/transport/chttp2/transport/hpack_table.c \
+    src/core/ext/transport/chttp2/transport/huffsyms.c \
+    src/core/ext/transport/chttp2/transport/incoming_metadata.c \
+    src/core/ext/transport/chttp2/transport/parsing.c \
+    src/core/ext/transport/chttp2/transport/status_conversion.c \
+    src/core/ext/transport/chttp2/transport/stream_lists.c \
+    src/core/ext/transport/chttp2/transport/stream_map.c \
+    src/core/ext/transport/chttp2/transport/timeout_encoding.c \
+    src/core/ext/transport/chttp2/transport/varint.c \
+    src/core/ext/transport/chttp2/transport/writing.c \
+    src/core/ext/transport/chttp2/alpn/alpn.c \
+    src/core/ext/client_config/channel_connectivity.c \
+    src/core/ext/client_config/client_channel.c \
+    src/core/ext/client_config/client_channel_factory.c \
+    src/core/ext/client_config/client_config.c \
+    src/core/ext/client_config/client_config_plugin.c \
+    src/core/ext/client_config/connector.c \
+    src/core/ext/client_config/default_initial_connect_string.c \
+    src/core/ext/client_config/initial_connect_string.c \
+    src/core/ext/client_config/lb_policy.c \
+    src/core/ext/client_config/lb_policy_factory.c \
+    src/core/ext/client_config/lb_policy_registry.c \
+    src/core/ext/client_config/parse_address.c \
+    src/core/ext/client_config/resolver.c \
+    src/core/ext/client_config/resolver_factory.c \
+    src/core/ext/client_config/resolver_registry.c \
+    src/core/ext/client_config/subchannel.c \
+    src/core/ext/client_config/subchannel_call_holder.c \
+    src/core/ext/client_config/subchannel_index.c \
+    src/core/ext/client_config/uri_parser.c \
+    src/core/lib/http/httpcli_security_connector.c \
+    src/core/lib/security/context/security_context.c \
+    src/core/lib/security/credentials/composite/composite_credentials.c \
+    src/core/lib/security/credentials/credentials.c \
+    src/core/lib/security/credentials/credentials_metadata.c \
+    src/core/lib/security/credentials/fake/fake_credentials.c \
+    src/core/lib/security/credentials/google_default/credentials_posix.c \
+    src/core/lib/security/credentials/google_default/credentials_windows.c \
+    src/core/lib/security/credentials/google_default/google_default_credentials.c \
+    src/core/lib/security/credentials/iam/iam_credentials.c \
+    src/core/lib/security/credentials/jwt/json_token.c \
+    src/core/lib/security/credentials/jwt/jwt_credentials.c \
+    src/core/lib/security/credentials/jwt/jwt_verifier.c \
+    src/core/lib/security/credentials/oauth2/oauth2_credentials.c \
+    src/core/lib/security/credentials/plugin/plugin_credentials.c \
+    src/core/lib/security/credentials/ssl/ssl_credentials.c \
+    src/core/lib/security/transport/client_auth_filter.c \
+    src/core/lib/security/transport/handshake.c \
+    src/core/lib/security/transport/secure_endpoint.c \
+    src/core/lib/security/transport/security_connector.c \
+    src/core/lib/security/transport/server_auth_filter.c \
+    src/core/lib/security/util/b64.c \
+    src/core/lib/security/util/json_util.c \
+    src/core/lib/surface/init_secure.c \
+    src/core/lib/tsi/fake_transport_security.c \
+    src/core/lib/tsi/ssl_transport_security.c \
+    src/core/lib/tsi/transport_security.c \
+    src/core/plugin_registry/grpc_cronet_plugin_registry.c \
+
+PUBLIC_HEADERS_C += \
+    include/grpc/byte_buffer.h \
+    include/grpc/byte_buffer_reader.h \
+    include/grpc/compression.h \
+    include/grpc/grpc.h \
+    include/grpc/status.h \
+    include/grpc/impl/codegen/byte_buffer.h \
+    include/grpc/impl/codegen/byte_buffer_reader.h \
+    include/grpc/impl/codegen/compression_types.h \
+    include/grpc/impl/codegen/connectivity_state.h \
+    include/grpc/impl/codegen/grpc_types.h \
+    include/grpc/impl/codegen/propagation_bits.h \
+    include/grpc/impl/codegen/status.h \
+    include/grpc/impl/codegen/alloc.h \
+    include/grpc/impl/codegen/atm.h \
+    include/grpc/impl/codegen/atm_gcc_atomic.h \
+    include/grpc/impl/codegen/atm_gcc_sync.h \
+    include/grpc/impl/codegen/atm_windows.h \
+    include/grpc/impl/codegen/log.h \
+    include/grpc/impl/codegen/port_platform.h \
+    include/grpc/impl/codegen/slice.h \
+    include/grpc/impl/codegen/slice_buffer.h \
+    include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_generic.h \
+    include/grpc/impl/codegen/sync_posix.h \
+    include/grpc/impl/codegen/sync_windows.h \
+    include/grpc/impl/codegen/time.h \
+    include/grpc/grpc_cronet.h \
+    include/grpc/grpc_security.h \
+    include/grpc/grpc_security_constants.h \
+
+LIBGRPC_CRONET_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_CRONET_SRC))))
+
+
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure libraries if you don't have OpenSSL.
+
+$(LIBDIR)/$(CONFIG)/libgrpc_cronet.a: openssl_dep_error
+
+$(LIBDIR)/$(CONFIG)/$(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT): openssl_dep_error
+
+else
+
+
+$(LIBDIR)/$(CONFIG)/libgrpc_cronet.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(LIBGRPC_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
+	$(E) "[AR]      Creating $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a
+	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a $(LIBGRPC_CRONET_OBJS)  $(LIBGPR_OBJS)  $(ZLIB_MERGE_OBJS)  $(OPENSSL_MERGE_OBJS) 
+ifeq ($(SYSTEM),Darwin)
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libgrpc_cronet.a
+endif
+
+
+
+ifeq ($(SYSTEM),MINGW32)
+$(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION).$(SHARED_EXT): $(LIBGRPC_CRONET_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared grpc_cronet.def -Wl,--output-def=$(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION).def -Wl,--out-implib=$(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION)-dll.a -o $(LIBDIR)/$(CONFIG)/grpc_cronet$(SHARED_VERSION).$(SHARED_EXT) $(LIBGRPC_CRONET_OBJS) $(LDLIBS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS)
+else
+$(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION).$(SHARED_EXT): $(LIBGRPC_CRONET_OBJS)  $(ZLIB_DEP) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_DEP)
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+ifeq ($(SYSTEM),Darwin)
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -install_name $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT) -dynamiclib -o $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION).$(SHARED_EXT) $(LIBGRPC_CRONET_OBJS) $(LDLIBS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS)
+else
+	$(Q) $(LD) $(LDFLAGS) -L$(LIBDIR)/$(CONFIG) -shared -Wl,-soname,libgrpc_cronet.so.0 -o $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION).$(SHARED_EXT) $(LIBGRPC_CRONET_OBJS) $(LDLIBS) $(LIBDIR)/$(CONFIG)/libgpr.a $(OPENSSL_MERGE_LIBS) $(LDLIBS_SECURE) $(ZLIB_MERGE_LIBS)
+	$(Q) ln -sf $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION).so.0
+	$(Q) ln -sf $(SHARED_PREFIX)grpc_cronet$(SHARED_VERSION).$(SHARED_EXT) $(LIBDIR)/$(CONFIG)/libgrpc_cronet$(SHARED_VERSION).so
+endif
+endif
+
+endif
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(LIBGRPC_CRONET_OBJS:.o=.dep)
+endif
+endif
+
+
 LIBGRPC_TEST_UTIL_SRC = \
     test/core/end2end/data/client_certs.c \
     test/core/end2end/data/server1_cert.c \
@@ -14249,6 +14502,7 @@ src/core/lib/surface/init_secure.c: $(OPENSSL_DEP)
 src/core/lib/tsi/fake_transport_security.c: $(OPENSSL_DEP)
 src/core/lib/tsi/ssl_transport_security.c: $(OPENSSL_DEP)
 src/core/lib/tsi/transport_security.c: $(OPENSSL_DEP)
+src/core/plugin_registry/grpc_cronet_plugin_registry.c: $(OPENSSL_DEP)
 src/core/plugin_registry/grpc_plugin_registry.c: $(OPENSSL_DEP)
 src/cpp/client/secure_credentials.cc: $(OPENSSL_DEP)
 src/cpp/common/auth_property_iterator.cc: $(OPENSSL_DEP)
diff --git a/binding.gyp b/binding.gyp
index 69dd283fea91c26a2a7e7f69233e9b9a3350e648..17ac2ffcbb87dab858edb3c04e34c2ee773e2f2a 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -718,9 +718,6 @@
         'src/core/ext/client_config/uri_parser.c',
         'src/core/ext/transport/chttp2/server/insecure/server_chttp2.c',
         'src/core/ext/transport/chttp2/client/insecure/channel_create.c',
-        'src/core/ext/transport/cronet/client/secure/cronet_channel_create.c',
-        'src/core/ext/transport/cronet/transport/cronet_api_dummy.c',
-        'src/core/ext/transport/cronet/transport/cronet_transport.c',
         'src/core/ext/lb_policy/grpclb/load_balancer_api.c',
         'src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
         'third_party/nanopb/pb_common.c',
diff --git a/build.yaml b/build.yaml
index 4350c28c57921599a2eda08fe7dd12f5540946fa..639016b75b47578441d0bb73c3249bd8ec27d838 100644
--- a/build.yaml
+++ b/build.yaml
@@ -415,7 +415,6 @@ filegroups:
   - grpc_client_config
 - name: grpc_secure
   public_headers:
-  - include/grpc/grpc_cronet.h
   - include/grpc/grpc_security.h
   - include/grpc/grpc_security_constants.h
   headers:
@@ -581,6 +580,10 @@ filegroups:
   - grpc_base
   - grpc_secure
 - name: grpc_transport_cronet_client_secure
+  public_headers:
+  - include/grpc/grpc_cronet.h
+  - include/grpc/grpc_security.h
+  - include/grpc/grpc_security_constants.h
   headers:
   - third_party/objective_c/Cronet/cronet_c_for_grpc.h
   src:
@@ -779,7 +782,6 @@ libs:
   - grpc_transport_chttp2_client_secure
   - grpc_transport_chttp2_server_insecure
   - grpc_transport_chttp2_client_insecure
-  - grpc_transport_cronet_client_secure
   - grpc_lb_policy_grpclb
   - grpc_lb_policy_pick_first
   - grpc_lb_policy_round_robin
@@ -794,6 +796,22 @@ libs:
   - grpc.dependencies.openssl
   - grpc.dependencies.zlib
   vs_project_guid: '{29D16885-7228-4C31-81ED-5F9187C7F2A9}'
+- name: grpc_cronet
+  build: all
+  language: c
+  src:
+  - src/core/lib/surface/init.c
+  baselib: true
+  deps_linkage: static
+  dll: true
+  filegroups:
+  - grpc_base
+  - grpc_transport_cronet_client_secure
+  - grpc_transport_chttp2_client_secure
+  generate_plugin_registry: true
+  platforms:
+  - linux
+  secure: true
 - name: grpc_dll
   build: private
   language: c
diff --git a/config.m4 b/config.m4
index ac38cdcc50b3f5198cf595e00f2bb5e6078f8439..c99e34aec9c68d03edd9b5a370136fb770f05b26 100644
--- a/config.m4
+++ b/config.m4
@@ -237,9 +237,6 @@ if test "$PHP_GRPC" != "no"; then
     src/core/ext/client_config/uri_parser.c \
     src/core/ext/transport/chttp2/server/insecure/server_chttp2.c \
     src/core/ext/transport/chttp2/client/insecure/channel_create.c \
-    src/core/ext/transport/cronet/client/secure/cronet_channel_create.c \
-    src/core/ext/transport/cronet/transport/cronet_api_dummy.c \
-    src/core/ext/transport/cronet/transport/cronet_transport.c \
     src/core/ext/lb_policy/grpclb/load_balancer_api.c \
     src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c \
     third_party/nanopb/pb_common.c \
@@ -583,8 +580,6 @@ if test "$PHP_GRPC" != "no"; then
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/transport/chttp2/server/insecure)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/transport/chttp2/server/secure)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/transport/chttp2/transport)
-  PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/transport/cronet/client/secure)
-  PHP_ADD_BUILD_DIR($ext_builddir/src/core/ext/transport/cronet/transport)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/channel)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/compression)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/lib/debug)
diff --git a/gRPC.podspec b/gRPC.podspec
index 56396ee9fca2cb54bf187ed0e930f1baff1f6768..65e68caff8dda9ddfb7b311fbe319d205f3c19fa 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -298,7 +298,6 @@ Pod::Spec.new do |s|
                       'src/core/ext/client_config/subchannel_call_holder.h',
                       'src/core/ext/client_config/subchannel_index.h',
                       'src/core/ext/client_config/uri_parser.h',
-                      'third_party/objective_c/Cronet/cronet_c_for_grpc.h',
                       'src/core/ext/lb_policy/grpclb/load_balancer_api.h',
                       'src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h',
                       'third_party/nanopb/pb.h',
@@ -340,7 +339,6 @@ Pod::Spec.new do |s|
                       'include/grpc/impl/codegen/sync_posix.h',
                       'include/grpc/impl/codegen/sync_windows.h',
                       'include/grpc/impl/codegen/time.h',
-                      'include/grpc/grpc_cronet.h',
                       'include/grpc/grpc_security.h',
                       'include/grpc/grpc_security_constants.h',
                       'include/grpc/census.h',
@@ -499,9 +497,6 @@ Pod::Spec.new do |s|
                       'src/core/ext/client_config/uri_parser.c',
                       'src/core/ext/transport/chttp2/server/insecure/server_chttp2.c',
                       'src/core/ext/transport/chttp2/client/insecure/channel_create.c',
-                      'src/core/ext/transport/cronet/client/secure/cronet_channel_create.c',
-                      'src/core/ext/transport/cronet/transport/cronet_api_dummy.c',
-                      'src/core/ext/transport/cronet/transport/cronet_transport.c',
                       'src/core/ext/lb_policy/grpclb/load_balancer_api.c',
                       'src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
                       'third_party/nanopb/pb_common.c',
@@ -671,7 +666,6 @@ Pod::Spec.new do |s|
                               'src/core/ext/client_config/subchannel_call_holder.h',
                               'src/core/ext/client_config/subchannel_index.h',
                               'src/core/ext/client_config/uri_parser.h',
-                              'third_party/objective_c/Cronet/cronet_c_for_grpc.h',
                               'src/core/ext/lb_policy/grpclb/load_balancer_api.h',
                               'src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h',
                               'third_party/nanopb/pb.h',
diff --git a/grpc.def b/grpc.def
index b811f0ff1296da2e5d393d677573e95a37b62da7..3477bd91ae8bddf8d1811cb15509d9bda09329cb 100644
--- a/grpc.def
+++ b/grpc.def
@@ -88,7 +88,6 @@ EXPORTS
     grpc_header_nonbin_value_is_legal
     grpc_is_binary_header
     grpc_call_error_to_string
-    grpc_cronet_secure_channel_create
     grpc_auth_property_iterator_next
     grpc_auth_context_property_iterator
     grpc_auth_context_peer_identity
diff --git a/grpc.gemspec b/grpc.gemspec
index 627221106d1886c57df38ca58175faed668dbee7..a715fb8a418fa626fe6d164e896a9bdcefd7c585 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -169,7 +169,6 @@ Gem::Specification.new do |s|
   s.files += %w( include/grpc/impl/codegen/sync_posix.h )
   s.files += %w( include/grpc/impl/codegen/sync_windows.h )
   s.files += %w( include/grpc/impl/codegen/time.h )
-  s.files += %w( include/grpc/grpc_cronet.h )
   s.files += %w( include/grpc/grpc_security.h )
   s.files += %w( include/grpc/grpc_security_constants.h )
   s.files += %w( include/grpc/census.h )
@@ -307,7 +306,6 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/ext/client_config/subchannel_call_holder.h )
   s.files += %w( src/core/ext/client_config/subchannel_index.h )
   s.files += %w( src/core/ext/client_config/uri_parser.h )
-  s.files += %w( third_party/objective_c/Cronet/cronet_c_for_grpc.h )
   s.files += %w( src/core/ext/lb_policy/grpclb/load_balancer_api.h )
   s.files += %w( src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h )
   s.files += %w( third_party/nanopb/pb.h )
@@ -478,9 +476,6 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/ext/client_config/uri_parser.c )
   s.files += %w( src/core/ext/transport/chttp2/server/insecure/server_chttp2.c )
   s.files += %w( src/core/ext/transport/chttp2/client/insecure/channel_create.c )
-  s.files += %w( src/core/ext/transport/cronet/client/secure/cronet_channel_create.c )
-  s.files += %w( src/core/ext/transport/cronet/transport/cronet_api_dummy.c )
-  s.files += %w( src/core/ext/transport/cronet/transport/cronet_transport.c )
   s.files += %w( src/core/ext/lb_policy/grpclb/load_balancer_api.c )
   s.files += %w( src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c )
   s.files += %w( third_party/nanopb/pb_common.c )
diff --git a/package.xml b/package.xml
index d838df76caa1a7b51f286ff2281e10131634cdd9..577e27001586a6b1777307d76c18f1231adbfbce 100644
--- a/package.xml
+++ b/package.xml
@@ -176,7 +176,6 @@
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_posix.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_windows.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/time.h" role="src" />
-    <file baseinstalldir="/" name="include/grpc/grpc_cronet.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/grpc_security.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/grpc_security_constants.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/census.h" role="src" />
@@ -314,7 +313,6 @@
     <file baseinstalldir="/" name="src/core/ext/client_config/subchannel_call_holder.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/client_config/subchannel_index.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/client_config/uri_parser.h" role="src" />
-    <file baseinstalldir="/" name="third_party/objective_c/Cronet/cronet_c_for_grpc.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/lb_policy/grpclb/load_balancer_api.h" role="src" />
     <file baseinstalldir="/" name="src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h" role="src" />
     <file baseinstalldir="/" name="third_party/nanopb/pb.h" role="src" />
@@ -485,9 +483,6 @@
     <file baseinstalldir="/" name="src/core/ext/client_config/uri_parser.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/server/insecure/server_chttp2.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/transport/chttp2/client/insecure/channel_create.c" role="src" />
-    <file baseinstalldir="/" name="src/core/ext/transport/cronet/client/secure/cronet_channel_create.c" role="src" />
-    <file baseinstalldir="/" name="src/core/ext/transport/cronet/transport/cronet_api_dummy.c" role="src" />
-    <file baseinstalldir="/" name="src/core/ext/transport/cronet/transport/cronet_transport.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/lb_policy/grpclb/load_balancer_api.c" role="src" />
     <file baseinstalldir="/" name="src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c" role="src" />
     <file baseinstalldir="/" name="third_party/nanopb/pb_common.c" role="src" />
diff --git a/src/compiler/csharp_generator.cc b/src/compiler/csharp_generator.cc
index 484fa3cdcc4357516ed92091845978e40f06e8f0..fc8feaf0fcc9bd36a1e6b22fb881a86360e9cb59 100644
--- a/src/compiler/csharp_generator.cc
+++ b/src/compiler/csharp_generator.cc
@@ -119,18 +119,10 @@ std::string GetServiceClassName(const ServiceDescriptor* service) {
   return service->name();
 }
 
-std::string GetClientInterfaceName(const ServiceDescriptor* service) {
-  return "I" + service->name() + "Client";
-}
-
 std::string GetClientClassName(const ServiceDescriptor* service) {
   return service->name() + "Client";
 }
 
-std::string GetServerInterfaceName(const ServiceDescriptor* service) {
-  return "I" + service->name();
-}
-
 std::string GetServerClassName(const ServiceDescriptor* service) {
   return service->name() + "Base";
 }
@@ -302,86 +294,6 @@ void GenerateServiceDescriptorProperty(Printer* out, const ServiceDescriptor *se
   out->Print("\n");
 }
 
-void GenerateClientInterface(Printer* out, const ServiceDescriptor *service) {
-  out->Print("/// <summary>Client for $servicename$</summary>\n",
-             "servicename", GetServiceClassName(service));
-  out->Print("[System.Obsolete(\"Client side interfaced will be removed "
-             "in the next release. Use client class directly.\")]\n");
-  out->Print("public interface $name$\n", "name",
-             GetClientInterfaceName(service));
-  out->Print("{\n");
-  out->Indent();
-  for (int i = 0; i < service->method_count(); i++) {
-    const MethodDescriptor *method = service->method(i);
-    MethodType method_type = GetMethodType(method);
-
-    if (method_type == METHODTYPE_NO_STREAMING) {
-      // unary calls have an extra synchronous stub method
-      GenerateDocCommentBody(out, method);
-      out->Print(
-          "$response$ $methodname$($request$ request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));\n",
-          "methodname", method->name(), "request",
-          GetClassName(method->input_type()), "response",
-          GetClassName(method->output_type()));
-
-      // overload taking CallOptions as a param
-      GenerateDocCommentBody(out, method);
-      out->Print(
-          "$response$ $methodname$($request$ request, CallOptions options);\n",
-          "methodname", method->name(), "request",
-          GetClassName(method->input_type()), "response",
-          GetClassName(method->output_type()));
-    }
-
-    std::string method_name = method->name();
-    if (method_type == METHODTYPE_NO_STREAMING) {
-      method_name += "Async";  // prevent name clash with synchronous method.
-    }
-    GenerateDocCommentBody(out, method);
-    out->Print(
-        "$returntype$ $methodname$($request_maybe$Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));\n",
-        "methodname", method_name, "request_maybe",
-        GetMethodRequestParamMaybe(method), "returntype",
-        GetMethodReturnTypeClient(method));
-
-    // overload taking CallOptions as a param
-    GenerateDocCommentBody(out, method);
-    out->Print(
-        "$returntype$ $methodname$($request_maybe$CallOptions options);\n",
-        "methodname", method_name, "request_maybe",
-        GetMethodRequestParamMaybe(method), "returntype",
-        GetMethodReturnTypeClient(method));
-  }
-  out->Outdent();
-  out->Print("}\n");
-  out->Print("\n");
-}
-
-void GenerateServerInterface(Printer* out, const ServiceDescriptor *service) {
-  out->Print("/// <summary>Interface of server-side implementations of $servicename$</summary>\n",
-             "servicename", GetServiceClassName(service));
-  out->Print("[System.Obsolete(\"Service implementations should inherit"
-      " from the generated abstract base class instead.\")]\n");
-  out->Print("public interface $name$\n", "name",
-             GetServerInterfaceName(service));
-  out->Print("{\n");
-  out->Indent();
-  for (int i = 0; i < service->method_count(); i++) {
-    const MethodDescriptor *method = service->method(i);
-    GenerateDocCommentBody(out, method);
-    out->Print(
-        "$returntype$ $methodname$($request$$response_stream_maybe$, "
-        "ServerCallContext context);\n",
-        "methodname", method->name(), "returntype",
-        GetMethodReturnTypeServer(method), "request",
-        GetMethodRequestParamServer(method), "response_stream_maybe",
-        GetMethodResponseStreamMaybe(method));
-  }
-  out->Outdent();
-  out->Print("}\n");
-  out->Print("\n");
-}
-
 void GenerateServerClass(Printer* out, const ServiceDescriptor *service) {
   out->Print("/// <summary>Base class for server-side implementations of $servicename$</summary>\n",
              "servicename", GetServiceClassName(service));
@@ -414,12 +326,9 @@ void GenerateServerClass(Printer* out, const ServiceDescriptor *service) {
 void GenerateClientStub(Printer* out, const ServiceDescriptor *service) {
   out->Print("/// <summary>Client for $servicename$</summary>\n",
              "servicename", GetServiceClassName(service));
-  out->Print("#pragma warning disable 0618\n");
   out->Print(
-      "public class $name$ : ClientBase<$name$>, $interface$\n",
-      "name", GetClientClassName(service),
-      "interface", GetClientInterfaceName(service));
-  out->Print("#pragma warning restore 0618\n");
+      "public class $name$ : ClientBase<$name$>\n",
+      "name", GetClientClassName(service));
   out->Print("{\n");
   out->Indent();
 
@@ -546,22 +455,16 @@ void GenerateClientStub(Printer* out, const ServiceDescriptor *service) {
   out->Print("\n");
 }
 
-void GenerateBindServiceMethod(Printer* out, const ServiceDescriptor *service,
-                               bool use_server_class) {
+void GenerateBindServiceMethod(Printer* out, const ServiceDescriptor *service) {
   out->Print(
       "/// <summary>Creates service definition that can be registered with a server</summary>\n");
-  out->Print("#pragma warning disable 0618\n");
   out->Print(
-      "public static ServerServiceDefinition BindService($interface$ serviceImpl)\n",
-      "interface", use_server_class ? GetServerClassName(service) :
-          GetServerInterfaceName(service));
-  out->Print("#pragma warning restore 0618\n");
+      "public static ServerServiceDefinition BindService($implclass$ serviceImpl)\n",
+      "implclass", GetServerClassName(service));
   out->Print("{\n");
   out->Indent();
 
-  out->Print(
-      "return ServerServiceDefinition.CreateBuilder($servicenamefield$)\n",
-      "servicenamefield", GetServiceNameFieldName());
+  out->Print("return ServerServiceDefinition.CreateBuilder()\n");
   out->Indent();
   out->Indent();
   for (int i = 0; i < service->method_count(); i++) {
@@ -616,11 +519,7 @@ void GenerateService(Printer* out, const ServiceDescriptor *service,
   }
   GenerateServiceDescriptorProperty(out, service);
 
-  if (generate_client) {
-    GenerateClientInterface(out, service);
-  }
   if (generate_server) {
-    GenerateServerInterface(out, service);
     GenerateServerClass(out, service);
   }
   if (generate_client) {
@@ -628,8 +527,7 @@ void GenerateService(Printer* out, const ServiceDescriptor *service,
     GenerateNewStubMethods(out, service);
   }
   if (generate_server) {
-    GenerateBindServiceMethod(out, service, false);
-    GenerateBindServiceMethod(out, service, true);
+    GenerateBindServiceMethod(out, service);
   }
 
   out->Outdent();
diff --git a/src/core/plugin_registry/grpc_cronet_plugin_registry.c b/src/core/plugin_registry/grpc_cronet_plugin_registry.c
new file mode 100644
index 0000000000000000000000000000000000000000..d0b5f5c702782231811b20400dc30d33fe461dc4
--- /dev/null
+++ b/src/core/plugin_registry/grpc_cronet_plugin_registry.c
@@ -0,0 +1,46 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/grpc.h>
+
+extern void grpc_chttp2_plugin_init(void);
+extern void grpc_chttp2_plugin_shutdown(void);
+extern void grpc_client_config_init(void);
+extern void grpc_client_config_shutdown(void);
+
+void grpc_register_built_in_plugins(void) {
+  grpc_register_plugin(grpc_chttp2_plugin_init,
+                       grpc_chttp2_plugin_shutdown);
+  grpc_register_plugin(grpc_client_config_init,
+                       grpc_client_config_shutdown);
+}
diff --git a/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs b/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs
new file mode 100644
index 0000000000000000000000000000000000000000..e605a310f9ef40122dbd70ec5d3937267b4b1c5d
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs
@@ -0,0 +1,90 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Diagnostics;
+using System.Linq;
+using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+namespace Grpc.Core.Tests
+{
+    public class AppDomainUnloadTest
+    {
+        [Test]
+        public void AppDomainUnloadHookCanCleanupAbandonedCall()
+        {
+            var setup = new AppDomainSetup
+            {
+                ApplicationBase = AppDomain.CurrentDomain.BaseDirectory
+            };
+            var childDomain = AppDomain.CreateDomain("test", null, setup);
+            var remoteObj = childDomain.CreateInstance(typeof(AppDomainTestClass).Assembly.GetName().Name, typeof(AppDomainTestClass).FullName);
+
+            // Try to unload the appdomain once we've created a server and a channel inside the appdomain.
+            AppDomain.Unload(childDomain);
+        }
+
+        public class AppDomainTestClass
+        {
+            const string Host = "127.0.0.1";
+
+            /// <summary>
+            /// Creates a server and a channel and initiates a call. The code is invoked from inside of an AppDomain
+            /// to test if AppDomain.Unload() work if Grpc is being used.
+            /// </summary>
+            public AppDomainTestClass()
+            {
+                var helper = new MockServiceHelper(Host);
+                var server = helper.GetServer();
+                server.Start();
+                var channel = helper.GetChannel();
+
+                var readyToShutdown = new TaskCompletionSource<object>();
+                helper.DuplexStreamingHandler = new DuplexStreamingServerMethod<string, string>(async (requestStream, responseStream, context) =>
+                {
+                    readyToShutdown.SetResult(null);
+                    await requestStream.ToListAsync();
+                });
+
+                var call = Calls.AsyncDuplexStreamingCall(helper.CreateDuplexStreamingCall());
+                readyToShutdown.Task.Wait();  // make sure handler is running
+            }
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core.Tests/ChannelTest.cs b/src/csharp/Grpc.Core.Tests/ChannelTest.cs
index 850d70ce926edab8477e9e065b00d87f84321b34..db0ef3a4cd3c416857fc17d3f503456b57746803 100644
--- a/src/csharp/Grpc.Core.Tests/ChannelTest.cs
+++ b/src/csharp/Grpc.Core.Tests/ChannelTest.cs
@@ -71,7 +71,7 @@ namespace Grpc.Core.Tests
         public void WaitForStateChangedAsync_InvalidArgument()
         {
             var channel = new Channel("localhost", ChannelCredentials.Insecure);
-            Assert.ThrowsAsync(typeof(ArgumentException), async () => await channel.WaitForStateChangedAsync(ChannelState.FatalFailure));
+            Assert.ThrowsAsync(typeof(ArgumentException), async () => await channel.WaitForStateChangedAsync(ChannelState.Shutdown));
             channel.ShutdownAsync().Wait();
         }
 
@@ -102,11 +102,11 @@ namespace Grpc.Core.Tests
         }
 
         [Test]
-        public async Task StateIsFatalFailureAfterShutdown()
+        public async Task StateIsShutdownAfterShutdown()
         {
             var channel = new Channel("localhost", ChannelCredentials.Insecure);
             await channel.ShutdownAsync();
-            Assert.AreEqual(ChannelState.FatalFailure, channel.State);
+            Assert.AreEqual(ChannelState.Shutdown, channel.State);
         }
 
         [Test]
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
index 47131fc454e42a73cd5d1fd01add281dd82e699d..074c9603dcf6e4fd62d95bdb4cebab24ed5e7a97 100644
--- a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
@@ -86,6 +86,10 @@
     <Compile Include="NUnitMain.cs" />
     <Compile Include="Internal\FakeNativeCall.cs" />
     <Compile Include="Internal\AsyncCallServerTest.cs" />
+    <Compile Include="ShutdownHookServerTest.cs" />
+    <Compile Include="ShutdownHookPendingCallTest.cs" />
+    <Compile Include="ShutdownHookClientTest.cs" />
+    <Compile Include="AppDomainUnloadTest.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
diff --git a/src/csharp/Grpc.Core.Tests/GrpcEnvironmentTest.cs b/src/csharp/Grpc.Core.Tests/GrpcEnvironmentTest.cs
index 6fe382751a1d0c38a2dbba2d3c8bf5fe709c5296..3ec2cf48cdeacca5675a443778a16bf2b3ed3936 100644
--- a/src/csharp/Grpc.Core.Tests/GrpcEnvironmentTest.cs
+++ b/src/csharp/Grpc.Core.Tests/GrpcEnvironmentTest.cs
@@ -49,7 +49,7 @@ namespace Grpc.Core.Tests
             {
                 Assert.IsNotNull(env.CompletionQueues.ElementAt(i));
             }
-            GrpcEnvironment.Release();
+            GrpcEnvironment.ReleaseAsync().Wait();
         }
 
         [Test]
@@ -58,8 +58,8 @@ namespace Grpc.Core.Tests
             var env1 = GrpcEnvironment.AddRef();
             var env2 = GrpcEnvironment.AddRef();
             Assert.AreSame(env1, env2);
-            GrpcEnvironment.Release();
-            GrpcEnvironment.Release();
+            GrpcEnvironment.ReleaseAsync().Wait();
+            GrpcEnvironment.ReleaseAsync().Wait();
         }
 
         [Test]
@@ -68,10 +68,10 @@ namespace Grpc.Core.Tests
             Assert.AreEqual(0, GrpcEnvironment.GetRefCount());
 
             var env1 = GrpcEnvironment.AddRef();
-            GrpcEnvironment.Release();
+            GrpcEnvironment.ReleaseAsync().Wait();
 
             var env2 = GrpcEnvironment.AddRef();
-            GrpcEnvironment.Release();
+            GrpcEnvironment.ReleaseAsync().Wait();
 
             Assert.AreNotSame(env1, env2);
         }
@@ -80,7 +80,7 @@ namespace Grpc.Core.Tests
         public void ReleaseWithoutAddRef()
         {
             Assert.AreEqual(0, GrpcEnvironment.GetRefCount());
-            Assert.Throws(typeof(InvalidOperationException), () => GrpcEnvironment.Release());
+            Assert.ThrowsAsync(typeof(InvalidOperationException), async () => await GrpcEnvironment.ReleaseAsync());
         }
 
         [Test]
diff --git a/src/csharp/Grpc.Core.Tests/Internal/CompletionQueueSafeHandleTest.cs b/src/csharp/Grpc.Core.Tests/Internal/CompletionQueueSafeHandleTest.cs
index 195119f920d99da41549fa90b2a13c552c0e072d..e9ec59eb3db3052a00ee4c84c18736d73623355e 100644
--- a/src/csharp/Grpc.Core.Tests/Internal/CompletionQueueSafeHandleTest.cs
+++ b/src/csharp/Grpc.Core.Tests/Internal/CompletionQueueSafeHandleTest.cs
@@ -48,7 +48,7 @@ namespace Grpc.Core.Internal.Tests
             GrpcEnvironment.AddRef();
             var cq = CompletionQueueSafeHandle.Create();
             cq.Dispose();
-            GrpcEnvironment.Release();
+            GrpcEnvironment.ReleaseAsync().Wait();
         }
 
         [Test]
@@ -59,7 +59,7 @@ namespace Grpc.Core.Internal.Tests
             cq.Shutdown();
             var ev = cq.Next();
             cq.Dispose();
-            GrpcEnvironment.Release();
+            GrpcEnvironment.ReleaseAsync().Wait();
             Assert.AreEqual(CompletionQueueEvent.CompletionType.Shutdown, ev.type);
             Assert.AreNotEqual(IntPtr.Zero, ev.success);
             Assert.AreEqual(IntPtr.Zero, ev.tag);
diff --git a/src/csharp/Grpc.Core.Tests/MockServiceHelper.cs b/src/csharp/Grpc.Core.Tests/MockServiceHelper.cs
index 30473143452b2915272c5fcfcfb61a107c84d52b..4d904700569220460580cd0ad5f129b53767aadc 100644
--- a/src/csharp/Grpc.Core.Tests/MockServiceHelper.cs
+++ b/src/csharp/Grpc.Core.Tests/MockServiceHelper.cs
@@ -102,7 +102,7 @@ namespace Grpc.Core.Tests
                 marshaller,
                 marshaller);
 
-            serviceDefinition = ServerServiceDefinition.CreateBuilder(ServiceName)
+            serviceDefinition = ServerServiceDefinition.CreateBuilder()
                 .AddMethod(unaryMethod, (request, context) => unaryHandler(request, context))
                 .AddMethod(clientStreamingMethod, (requestStream, context) => clientStreamingHandler(requestStream, context))
                 .AddMethod(serverStreamingMethod, (request, responseStream, context) => serverStreamingHandler(request, responseStream, context))
diff --git a/src/csharp/Grpc.Core.Tests/PInvokeTest.cs b/src/csharp/Grpc.Core.Tests/PInvokeTest.cs
index d2b2fc6a6613e52d245170d658f67dc24fda8cf4..d3735c78807bee4e8ed508c7966cc03c67594b97 100644
--- a/src/csharp/Grpc.Core.Tests/PInvokeTest.cs
+++ b/src/csharp/Grpc.Core.Tests/PInvokeTest.cs
@@ -65,7 +65,7 @@ namespace Grpc.Core.Tests
                     cq.Dispose();
                 });
 
-            GrpcEnvironment.Release();
+            GrpcEnvironment.ReleaseAsync().Wait();
         }
 
         /// <summary>
diff --git a/src/csharp/Grpc.Core.Tests/ServerTest.cs b/src/csharp/Grpc.Core.Tests/ServerTest.cs
index b40508accc7359b7da4e5a80efdc85ff6a6d7f90..fa693162adad51a283e2995367998c72a8b64d9c 100644
--- a/src/csharp/Grpc.Core.Tests/ServerTest.cs
+++ b/src/csharp/Grpc.Core.Tests/ServerTest.cs
@@ -89,7 +89,7 @@ namespace Grpc.Core.Tests
             };
             server.Start();
             Assert.Throws(typeof(InvalidOperationException), () => server.Ports.Add("localhost", 9999, ServerCredentials.Insecure));
-            Assert.Throws(typeof(InvalidOperationException), () => server.Services.Add(ServerServiceDefinition.CreateBuilder("serviceName").Build()));
+            Assert.Throws(typeof(InvalidOperationException), () => server.Services.Add(ServerServiceDefinition.CreateBuilder().Build()));
 
             server.ShutdownAsync().Wait();
         }
diff --git a/src/csharp/Grpc.Core.Tests/ShutdownHookClientTest.cs b/src/csharp/Grpc.Core.Tests/ShutdownHookClientTest.cs
new file mode 100644
index 0000000000000000000000000000000000000000..12b8452f64f9da3157bfc1ffea8f92247304f9b5
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/ShutdownHookClientTest.cs
@@ -0,0 +1,57 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+namespace Grpc.Core.Tests
+{
+    public class ShutdownHookClientTest
+    {
+        const string Host = "127.0.0.1";
+
+        [Test]
+        public void ProcessExitHookCanCleanupAbandonedChannels()
+        {
+            var channel = new Channel(Host, 1000, ChannelCredentials.Insecure);
+            var channel2 = new Channel(Host, 1001, ChannelCredentials.Insecure);
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core.Tests/ShutdownHookPendingCallTest.cs b/src/csharp/Grpc.Core.Tests/ShutdownHookPendingCallTest.cs
new file mode 100644
index 0000000000000000000000000000000000000000..175233840de8650fe497795041ce891c6a783647
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/ShutdownHookPendingCallTest.cs
@@ -0,0 +1,69 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+namespace Grpc.Core.Tests
+{
+    public class ShutdownHookPendingCallTest
+    {
+        const string Host = "127.0.0.1";
+
+        [Test]
+        public void ProcessExitHookCanCleanupAbandonedCall()
+        {
+            var helper = new MockServiceHelper(Host);
+            var server = helper.GetServer();
+            server.Start();
+            var channel = helper.GetChannel();
+
+            var readyToShutdown = new TaskCompletionSource<object>();
+            helper.DuplexStreamingHandler = new DuplexStreamingServerMethod<string, string>(async (requestStream, responseStream, context) =>
+            {
+                readyToShutdown.SetResult(null);
+                await requestStream.ToListAsync();
+            });
+
+            var call = Calls.AsyncDuplexStreamingCall(helper.CreateDuplexStreamingCall());
+            readyToShutdown.Task.Wait();  // make sure handler is running
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core.Tests/ShutdownHookServerTest.cs b/src/csharp/Grpc.Core.Tests/ShutdownHookServerTest.cs
new file mode 100644
index 0000000000000000000000000000000000000000..e7ea7a0bf5977a3648e57a76b3371c375de9027b
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/ShutdownHookServerTest.cs
@@ -0,0 +1,58 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+namespace Grpc.Core.Tests
+{
+    public class ShutdownHookServerTest
+    {
+        const string Host = "127.0.0.1";
+
+        [Test]
+        public void ProcessExitHookCanCleanupAbandonedServers()
+        {
+            var helper = new MockServiceHelper(Host);
+            var server = helper.GetServer();
+            server.Start();
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core/AsyncClientStreamingCall.cs b/src/csharp/Grpc.Core/AsyncClientStreamingCall.cs
index 5646fed3d960bf998bb99058f5f35e54d5bff459..02b08d2a10c8ffffddd9bdfea862525106cb28e8 100644
--- a/src/csharp/Grpc.Core/AsyncClientStreamingCall.cs
+++ b/src/csharp/Grpc.Core/AsyncClientStreamingCall.cs
@@ -127,6 +127,10 @@ namespace Grpc.Core
         /// Otherwise, requests cancellation of the call which should terminate all pending async operations associated with the call.
         /// As a result, all resources being used by the call should be released eventually.
         /// </summary>
+        /// <remarks>
+        /// Normally, there is no need for you to dispose the call unless you want to utilize the
+        /// "Cancel" semantics of invoking <c>Dispose</c>.
+        /// </remarks>
         public void Dispose()
         {
             disposeAction.Invoke();
diff --git a/src/csharp/Grpc.Core/AsyncDuplexStreamingCall.cs b/src/csharp/Grpc.Core/AsyncDuplexStreamingCall.cs
index e75108c7e57b1ce6fef350bcbc9d12dc00127a28..68fd6d0b05e44fb046d5f47b2bf3f59b61dc4976 100644
--- a/src/csharp/Grpc.Core/AsyncDuplexStreamingCall.cs
+++ b/src/csharp/Grpc.Core/AsyncDuplexStreamingCall.cs
@@ -117,6 +117,10 @@ namespace Grpc.Core
         /// Otherwise, requests cancellation of the call which should terminate all pending async operations associated with the call.
         /// As a result, all resources being used by the call should be released eventually.
         /// </summary>
+        /// <remarks>
+        /// Normally, there is no need for you to dispose the call unless you want to utilize the
+        /// "Cancel" semantics of invoking <c>Dispose</c>.
+        /// </remarks>
         public void Dispose()
         {
             disposeAction.Invoke();
diff --git a/src/csharp/Grpc.Core/AsyncServerStreamingCall.cs b/src/csharp/Grpc.Core/AsyncServerStreamingCall.cs
index f9530919848140fb9e1d218536b370d7915ce9ae..5777c726152c20bade8ee6862e2a441ab9bf7cf7 100644
--- a/src/csharp/Grpc.Core/AsyncServerStreamingCall.cs
+++ b/src/csharp/Grpc.Core/AsyncServerStreamingCall.cs
@@ -103,6 +103,10 @@ namespace Grpc.Core
         /// Otherwise, requests cancellation of the call which should terminate all pending async operations associated with the call.
         /// As a result, all resources being used by the call should be released eventually.
         /// </summary>
+        /// <remarks>
+        /// Normally, there is no need for you to dispose the call unless you want to utilize the
+        /// "Cancel" semantics of invoking <c>Dispose</c>.
+        /// </remarks>
         public void Dispose()
         {
             disposeAction.Invoke();
diff --git a/src/csharp/Grpc.Core/AsyncUnaryCall.cs b/src/csharp/Grpc.Core/AsyncUnaryCall.cs
index 97df8f5e91bc13fa88c602bbbfe467946573dfdd..d180c27922d491d89f113f5aa26803da9b613a2b 100644
--- a/src/csharp/Grpc.Core/AsyncUnaryCall.cs
+++ b/src/csharp/Grpc.Core/AsyncUnaryCall.cs
@@ -112,6 +112,10 @@ namespace Grpc.Core
         /// Otherwise, requests cancellation of the call which should terminate all pending async operations associated with the call.
         /// As a result, all resources being used by the call should be released eventually.
         /// </summary>
+        /// <remarks>
+        /// Normally, there is no need for you to dispose the call unless you want to utilize the
+        /// "Cancel" semantics of invoking <c>Dispose</c>.
+        /// </remarks>
         public void Dispose()
         {
             disposeAction.Invoke();
diff --git a/src/csharp/Grpc.Core/CallOptions.cs b/src/csharp/Grpc.Core/CallOptions.cs
index 9ca88849ee5ff3fa5db7cf1dc02b717eeee28f15..35548cfc96b5ffdaa4c1d491dc5f4961725d64b0 100644
--- a/src/csharp/Grpc.Core/CallOptions.cs
+++ b/src/csharp/Grpc.Core/CallOptions.cs
@@ -88,7 +88,13 @@ namespace Grpc.Core
         }
 
         /// <summary>
-        /// Token that can be used for cancelling the call.
+        /// Token that can be used for cancelling the call on the client side.
+        /// Cancelling the token will request cancellation
+        /// of the remote call. Best effort will be made to deliver the cancellation
+        /// notification to the server and interaction of the call with the server side
+        /// will be terminated. Unless the call finishes before the cancellation could
+        /// happen (there is an inherent race),
+        /// the call will finish with <c>StatusCode.Cancelled</c> status.
         /// </summary>
         public CancellationToken CancellationToken
         {
diff --git a/src/csharp/Grpc.Core/Channel.cs b/src/csharp/Grpc.Core/Channel.cs
index 886adfec334f8c8711ebedb98346190337a7a6be..e0fc7180dafc043caab0b6bbf496f0002224c356 100644
--- a/src/csharp/Grpc.Core/Channel.cs
+++ b/src/csharp/Grpc.Core/Channel.cs
@@ -88,6 +88,7 @@ namespace Grpc.Core
                     this.handle = ChannelSafeHandle.CreateInsecure(target, nativeChannelArgs);
                 }
             }
+            GrpcEnvironment.RegisterChannel(this);
         }
 
         /// <summary>
@@ -104,7 +105,7 @@ namespace Grpc.Core
 
         /// <summary>
         /// Gets current connectivity state of this channel.
-        /// After channel is has been shutdown, <c>ChannelState.FatalFailure</c> will be returned.
+        /// After channel is has been shutdown, <c>ChannelState.Shutdown</c> will be returned.
         /// </summary>
         public ChannelState State
         {
@@ -121,8 +122,8 @@ namespace Grpc.Core
         /// </summary>
         public Task WaitForStateChangedAsync(ChannelState lastObservedState, DateTime? deadline = null)
         {
-            GrpcPreconditions.CheckArgument(lastObservedState != ChannelState.FatalFailure,
-                "FatalFailure is a terminal state. No further state changes can occur.");
+            GrpcPreconditions.CheckArgument(lastObservedState != ChannelState.Shutdown,
+                "Shutdown is a terminal state. No further state changes can occur.");
             var tcs = new TaskCompletionSource<object>();
             var deadlineTimespec = deadline.HasValue ? Timespec.FromDateTime(deadline.Value) : Timespec.InfFuture;
             var handler = new BatchCompletionDelegate((success, ctx) =>
@@ -172,7 +173,7 @@ namespace Grpc.Core
         /// <summary>
         /// Allows explicitly requesting channel to connect without starting an RPC.
         /// Returned task completes once state Ready was seen. If the deadline is reached,
-        /// or channel enters the FatalFailure state, the task is cancelled.
+        /// or channel enters the Shutdown state, the task is cancelled.
         /// There is no need to call this explicitly unless your use case requires that.
         /// Starting an RPC on a new channel will request connection implicitly.
         /// </summary>
@@ -182,9 +183,9 @@ namespace Grpc.Core
             var currentState = GetConnectivityState(true);
             while (currentState != ChannelState.Ready)
             {
-                if (currentState == ChannelState.FatalFailure)
+                if (currentState == ChannelState.Shutdown)
                 {
-                    throw new OperationCanceledException("Channel has reached FatalFailure state.");
+                    throw new OperationCanceledException("Channel has reached Shutdown state.");
                 }
                 await WaitForStateChangedAsync(currentState, deadline).ConfigureAwait(false);
                 currentState = GetConnectivityState(false);
@@ -192,9 +193,16 @@ namespace Grpc.Core
         }
 
         /// <summary>
-        /// Waits until there are no more active calls for this channel and then cleans up
-        /// resources used by this channel.
+        /// Shuts down the channel cleanly. It is strongly recommended to shutdown
+        /// all previously created channels before exiting from the process.
         /// </summary>
+        /// <remarks>
+        /// This method doesn't wait for all calls on this channel to finish (nor does
+        /// it explicitly cancel all outstanding calls). It is user's responsibility to make sure
+        /// all the calls on this channel have finished (successfully or with an error)
+        /// before shutting down the channel to ensure channel shutdown won't impact
+        /// the outcome of those remote calls.
+        /// </remarks>
         public async Task ShutdownAsync()
         {
             lock (myLock)
@@ -202,6 +210,7 @@ namespace Grpc.Core
                 GrpcPreconditions.CheckState(!shutdownRequested);
                 shutdownRequested = true;
             }
+            GrpcEnvironment.UnregisterChannel(this);
 
             shutdownTokenSource.Cancel();
 
@@ -213,7 +222,7 @@ namespace Grpc.Core
 
             handle.Dispose();
 
-            await Task.Run(() => GrpcEnvironment.Release()).ConfigureAwait(false);
+            await GrpcEnvironment.ReleaseAsync().ConfigureAwait(false);
         }
 
         internal ChannelSafeHandle Handle
@@ -264,7 +273,7 @@ namespace Grpc.Core
             }
             catch (ObjectDisposedException)
             {
-                return ChannelState.FatalFailure;
+                return ChannelState.Shutdown;
             }
         }
 
diff --git a/src/csharp/Grpc.Core/ChannelState.cs b/src/csharp/Grpc.Core/ChannelState.cs
index d293b98f7537876b5fd3579ceaa1aff21cb0db3c..a6c3b2a48899dcd7f20c20133a40e31198ef0cf0 100644
--- a/src/csharp/Grpc.Core/ChannelState.cs
+++ b/src/csharp/Grpc.Core/ChannelState.cs
@@ -64,6 +64,6 @@ namespace Grpc.Core
         /// <summary>
         /// Channel has seen a failure that it cannot recover from
         /// </summary>
-        FatalFailure
+        Shutdown
     }
 }
diff --git a/src/csharp/Grpc.Core/GrpcEnvironment.cs b/src/csharp/Grpc.Core/GrpcEnvironment.cs
index 18af1099f1b33999550ef28de65110470bc5cd5b..0359d9092a7f5e3a7d247359a450fedd82d94c42 100644
--- a/src/csharp/Grpc.Core/GrpcEnvironment.cs
+++ b/src/csharp/Grpc.Core/GrpcEnvironment.cs
@@ -35,6 +35,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Runtime.InteropServices;
+using System.Threading.Tasks;
 using Grpc.Core.Internal;
 using Grpc.Core.Logging;
 using Grpc.Core.Utils;
@@ -53,12 +54,16 @@ namespace Grpc.Core
         static int refCount;
         static int? customThreadPoolSize;
         static int? customCompletionQueueCount;
+        static readonly HashSet<Channel> registeredChannels = new HashSet<Channel>();
+        static readonly HashSet<Server> registeredServers = new HashSet<Server>();
 
         static ILogger logger = new ConsoleLogger();
 
+        readonly object myLock = new object();
         readonly GrpcThreadPool threadPool;
         readonly DebugStats debugStats = new DebugStats();
         readonly AtomicCounter cqPickerCounter = new AtomicCounter();
+
         bool isClosed;
 
         /// <summary>
@@ -67,6 +72,8 @@ namespace Grpc.Core
         /// </summary>
         internal static GrpcEnvironment AddRef()
         {
+            ShutdownHooks.Register();
+
             lock (staticLock)
             {
                 refCount++;
@@ -79,21 +86,26 @@ namespace Grpc.Core
         }
 
         /// <summary>
-        /// Decrements the reference count for currently active environment and shuts down the gRPC environment if reference count drops to zero.
-        /// (and blocks until the environment has been fully shutdown).
+        /// Decrements the reference count for currently active environment and asynchronously shuts down the gRPC environment if reference count drops to zero.
         /// </summary>
-        internal static void Release()
+        internal static async Task ReleaseAsync()
         {
+            GrpcEnvironment instanceToShutdown = null;
             lock (staticLock)
             {
                 GrpcPreconditions.CheckState(refCount > 0);
                 refCount--;
                 if (refCount == 0)
                 {
-                    instance.Close();
+                    instanceToShutdown = instance;
                     instance = null;
                 }
             }
+
+            if (instanceToShutdown != null)
+            {
+                await instanceToShutdown.ShutdownAsync();
+            }
         }
 
         internal static int GetRefCount()
@@ -104,6 +116,68 @@ namespace Grpc.Core
             }
         }
 
+        internal static void RegisterChannel(Channel channel)
+        {
+            lock (staticLock)
+            {
+                GrpcPreconditions.CheckNotNull(channel);
+                registeredChannels.Add(channel);
+            }
+        }
+
+        internal static void UnregisterChannel(Channel channel)
+        {
+            lock (staticLock)
+            {
+                GrpcPreconditions.CheckNotNull(channel);
+                GrpcPreconditions.CheckArgument(registeredChannels.Remove(channel), "Channel not found in the registered channels set.");
+            }
+        }
+
+        internal static void RegisterServer(Server server)
+        {
+            lock (staticLock)
+            {
+                GrpcPreconditions.CheckNotNull(server);
+                registeredServers.Add(server);
+            }
+        }
+
+        internal static void UnregisterServer(Server server)
+        {
+            lock (staticLock)
+            {
+                GrpcPreconditions.CheckNotNull(server);
+                GrpcPreconditions.CheckArgument(registeredServers.Remove(server), "Server not found in the registered servers set.");
+            }
+        }
+
+        /// <summary>
+        /// Requests shutdown of all channels created by the current process.
+        /// </summary>
+        public static Task ShutdownChannelsAsync()
+        {
+            HashSet<Channel> snapshot = null;
+            lock (staticLock)
+            {
+                snapshot = new HashSet<Channel>(registeredChannels);
+            }
+            return Task.WhenAll(snapshot.Select((channel) => channel.ShutdownAsync()));
+        }
+
+        /// <summary>
+        /// Requests immediate shutdown of all servers created by the current process.
+        /// </summary>
+        public static Task KillServersAsync()
+        {
+            HashSet<Server> snapshot = null;
+            lock (staticLock)
+            {
+                snapshot = new HashSet<Server>(registeredServers);
+            }
+            return Task.WhenAll(snapshot.Select((server) => server.KillAsync()));
+        }
+
         /// <summary>
         /// Gets application-wide logger used by gRPC.
         /// </summary>
@@ -180,6 +254,14 @@ namespace Grpc.Core
             }
         }
 
+        internal bool IsAlive
+        {
+            get
+            {
+                return this.threadPool.IsAlive;
+            }
+        }
+
         /// <summary>
         /// Picks a completion queue in a round-robin fashion.
         /// Shouldn't be invoked on a per-call basis (used at per-channel basis).
@@ -223,13 +305,13 @@ namespace Grpc.Core
         /// <summary>
         /// Shuts down this environment.
         /// </summary>
-        private void Close()
+        private async Task ShutdownAsync()
         {
             if (isClosed)
             {
                 throw new InvalidOperationException("Close has already been called");
             }
-            threadPool.Stop();
+            await threadPool.StopAsync().ConfigureAwait(false);
             GrpcNativeShutdown();
             isClosed = true;
 
@@ -257,5 +339,32 @@ namespace Grpc.Core
             // by default, create a completion queue for each thread
             return GetThreadPoolSizeOrDefault();
         }
+
+        private static class ShutdownHooks
+        {
+            static object staticLock = new object();
+            static bool hooksRegistered;
+
+            public static void Register()
+            {
+                lock (staticLock)
+                {
+                    if (!hooksRegistered)
+                    {
+                        AppDomain.CurrentDomain.ProcessExit += ShutdownHookHandler;
+                        AppDomain.CurrentDomain.DomainUnload += ShutdownHookHandler;
+                    }
+                    hooksRegistered = true;
+                }
+            }
+
+            /// <summary>
+            /// Handler for AppDomain.DomainUnload and AppDomain.ProcessExit hooks.
+            /// </summary>
+            private static void ShutdownHookHandler(object sender, EventArgs e)
+            {
+                Task.WaitAll(GrpcEnvironment.ShutdownChannelsAsync(), GrpcEnvironment.KillServersAsync());
+            }
+        }
     }
 }
diff --git a/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs b/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs
index 4de543bef7a96625f301e7a0e344547c3884fa90..a446c1f99f2f1ff6d239d3e11db5c22e83b69fd3 100644
--- a/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs
+++ b/src/csharp/Grpc.Core/Internal/GrpcThreadPool.cs
@@ -35,6 +35,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
+using System.Threading.Tasks;
 using Grpc.Core.Logging;
 using Grpc.Core.Utils;
 
@@ -53,6 +54,8 @@ namespace Grpc.Core.Internal
         readonly int poolSize;
         readonly int completionQueueCount;
 
+        bool stopRequested;
+
         IReadOnlyCollection<CompletionQueueSafeHandle> completionQueues;
 
         /// <summary>
@@ -84,15 +87,21 @@ namespace Grpc.Core.Internal
             }
         }
 
-        public void Stop()
+        public Task StopAsync()
         {
             lock (myLock)
             {
+                GrpcPreconditions.CheckState(!stopRequested, "Stop already requested.");
+                stopRequested = true;
+
                 foreach (var cq in completionQueues)
                 {
                     cq.Shutdown();
                 }
+            }
 
+            return Task.Run(() =>
+            {
                 foreach (var thread in threads)
                 {
                     thread.Join();
@@ -102,6 +111,21 @@ namespace Grpc.Core.Internal
                 {
                     cq.Dispose();
                 }
+            });
+        }
+
+        /// <summary>
+        /// Returns true if there is at least one thread pool thread that hasn't
+        /// already stopped.
+        /// Threads can either stop because all completion queues shut down or
+        /// because all foreground threads have already shutdown and process is
+        /// going to exit.
+        /// </summary>
+        internal bool IsAlive
+        {
+            get
+            {
+                return threads.Any(t => t.ThreadState != ThreadState.Stopped);
             }
         }
 
@@ -119,7 +143,7 @@ namespace Grpc.Core.Internal
             var cq = completionQueues.ElementAt(cqIndex);
 
             var thread = new Thread(new ThreadStart(() => RunHandlerLoop(cq)));
-            thread.IsBackground = false;
+            thread.IsBackground = true;
             thread.Name = string.Format("grpc {0} (cq {1})", threadIndex, cqIndex);
             thread.Start();
 
diff --git a/src/csharp/Grpc.Core/Server.cs b/src/csharp/Grpc.Core/Server.cs
index 069185e13af9b6da2af5fee9ecaea1174d951d3f..e3468ee8420d18e54854fd06dcb1c520eaf2a2fb 100644
--- a/src/csharp/Grpc.Core/Server.cs
+++ b/src/csharp/Grpc.Core/Server.cs
@@ -86,6 +86,7 @@ namespace Grpc.Core
             {
                 this.handle.RegisterCompletionQueue(cq);
             }
+            GrpcEnvironment.RegisterServer(this);
         }
 
         /// <summary>
@@ -152,43 +153,24 @@ namespace Grpc.Core
         /// cleans up used resources. The returned task finishes when shutdown procedure
         /// is complete.
         /// </summary>
-        public async Task ShutdownAsync()
+        /// <remarks>
+        /// It is strongly recommended to shutdown all previously created servers before exiting from the process.
+        /// </remarks>
+        public Task ShutdownAsync()
         {
-            lock (myLock)
-            {
-                GrpcPreconditions.CheckState(startRequested);
-                GrpcPreconditions.CheckState(!shutdownRequested);
-                shutdownRequested = true;
-            }
-
-            var cq = environment.CompletionQueues.First();  // any cq will do
-            handle.ShutdownAndNotify(HandleServerShutdown, cq);
-            await shutdownTcs.Task.ConfigureAwait(false);
-            DisposeHandle();
-
-            await Task.Run(() => GrpcEnvironment.Release()).ConfigureAwait(false);
+            return ShutdownInternalAsync(false);
         }
 
         /// <summary>
         /// Requests server shutdown while cancelling all the in-progress calls.
         /// The returned task finishes when shutdown procedure is complete.
         /// </summary>
-        public async Task KillAsync()
+        /// <remarks>
+        /// It is strongly recommended to shutdown all previously created servers before exiting from the process.
+        /// </remarks>
+        public Task KillAsync()
         {
-            lock (myLock)
-            {
-                GrpcPreconditions.CheckState(startRequested);
-                GrpcPreconditions.CheckState(!shutdownRequested);
-                shutdownRequested = true;
-            }
-
-            var cq = environment.CompletionQueues.First();  // any cq will do
-            handle.ShutdownAndNotify(HandleServerShutdown, cq);
-            handle.CancelAllCalls();
-            await shutdownTcs.Task.ConfigureAwait(false);
-            DisposeHandle();
-
-            await Task.Run(() => GrpcEnvironment.Release()).ConfigureAwait(false);
+            return ShutdownInternalAsync(true);
         }
 
         internal void AddCallReference(object call)
@@ -206,6 +188,53 @@ namespace Grpc.Core
             activeCallCounter.Decrement();
         }
 
+        /// <summary>
+        /// Shuts down the server.
+        /// </summary>
+        private async Task ShutdownInternalAsync(bool kill)
+        {
+            lock (myLock)
+            {
+                GrpcPreconditions.CheckState(startRequested);
+                GrpcPreconditions.CheckState(!shutdownRequested);
+                shutdownRequested = true;
+            }
+            GrpcEnvironment.UnregisterServer(this);
+
+            var cq = environment.CompletionQueues.First();  // any cq will do
+            handle.ShutdownAndNotify(HandleServerShutdown, cq);
+            if (kill)
+            {
+                handle.CancelAllCalls();
+            }
+
+            await ShutdownCompleteOrEnvironmentDeadAsync().ConfigureAwait(false);
+
+            DisposeHandle();
+
+            await GrpcEnvironment.ReleaseAsync().ConfigureAwait(false);
+        }
+
+        /// <summary>
+        /// In case the environment's threadpool becomes dead, the shutdown completion will
+        /// never be delivered, but we need to release the environment's handle anyway.
+        /// </summary>
+        private async Task ShutdownCompleteOrEnvironmentDeadAsync()
+        {
+            while (true)
+            {
+                var task = await Task.WhenAny(shutdownTcs.Task, Task.Delay(20)).ConfigureAwait(false);
+                if (shutdownTcs.Task == task)
+                {
+                    return;
+                }
+                if (!environment.IsAlive)
+                {
+                    return;
+                }
+            }
+        }
+
         /// <summary>
         /// Adds a service definition.
         /// </summary>
diff --git a/src/csharp/Grpc.Core/ServerServiceDefinition.cs b/src/csharp/Grpc.Core/ServerServiceDefinition.cs
index deb1431ca36f6749d51e09237d3b661ff3d7eecf..ac08c04bf6ad9b66341bf9127da0950f771ad36c 100644
--- a/src/csharp/Grpc.Core/ServerServiceDefinition.cs
+++ b/src/csharp/Grpc.Core/ServerServiceDefinition.cs
@@ -63,11 +63,10 @@ namespace Grpc.Core
         /// <summary>
         /// Creates a new builder object for <c>ServerServiceDefinition</c>.
         /// </summary>
-        /// <param name="serviceName">The service name.</param>
         /// <returns>The builder object.</returns>
-        public static Builder CreateBuilder(string serviceName)
+        public static Builder CreateBuilder()
         {
-            return new Builder(serviceName);
+            return new Builder();
         }
 
         /// <summary>
@@ -75,16 +74,13 @@ namespace Grpc.Core
         /// </summary>
         public class Builder
         {
-            readonly string serviceName;
             readonly Dictionary<string, IServerCallHandler> callHandlers = new Dictionary<string, IServerCallHandler>();
 
             /// <summary>
             /// Creates a new instance of builder.
             /// </summary>
-            /// <param name="serviceName">The service name.</param>
-            public Builder(string serviceName)
+            public Builder()
             {
-                this.serviceName = serviceName;
             }
 
             /// <summary>
diff --git a/src/csharp/Grpc.Examples/MathGrpc.cs b/src/csharp/Grpc.Examples/MathGrpc.cs
index d700a18778bb7a0ea18c1d162117bdebcdbe1150..4bbefcbe01a097f9ca21ee63d06b0231b0465af9 100644
--- a/src/csharp/Grpc.Examples/MathGrpc.cs
+++ b/src/csharp/Grpc.Examples/MathGrpc.cs
@@ -81,103 +81,12 @@ namespace Math {
       get { return global::Math.MathReflection.Descriptor.Services[0]; }
     }
 
-    /// <summary>Client for Math</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface IMathClient
-    {
-      /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
-      /// </summary>
-      global::Math.DivReply Div(global::Math.DivArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
-      /// </summary>
-      global::Math.DivReply Div(global::Math.DivArgs request, CallOptions options);
-      /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
-      /// </summary>
-      AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
-      /// </summary>
-      AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, CallOptions options);
-      /// <summary>
-      ///  DivMany accepts an arbitrary number of division args from the client stream
-      ///  and sends back the results in the reply stream.  The stream continues until
-      ///  the client closes its end; the server does the same after sending all the
-      ///  replies.  The stream ends immediately if either end aborts.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Math.DivArgs, global::Math.DivReply> DivMany(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  DivMany accepts an arbitrary number of division args from the client stream
-      ///  and sends back the results in the reply stream.  The stream continues until
-      ///  the client closes its end; the server does the same after sending all the
-      ///  replies.  The stream ends immediately if either end aborts.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Math.DivArgs, global::Math.DivReply> DivMany(CallOptions options);
-      /// <summary>
-      ///  Fib generates numbers in the Fibonacci sequence.  If args.limit > 0, Fib
-      ///  generates up to limit numbers; otherwise it continues until the call is
-      ///  canceled.  Unlike Fib above, Fib has no final FibReply.
-      /// </summary>
-      AsyncServerStreamingCall<global::Math.Num> Fib(global::Math.FibArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Fib generates numbers in the Fibonacci sequence.  If args.limit > 0, Fib
-      ///  generates up to limit numbers; otherwise it continues until the call is
-      ///  canceled.  Unlike Fib above, Fib has no final FibReply.
-      /// </summary>
-      AsyncServerStreamingCall<global::Math.Num> Fib(global::Math.FibArgs request, CallOptions options);
-      /// <summary>
-      ///  Sum sums a stream of numbers, returning the final result once the stream
-      ///  is closed.
-      /// </summary>
-      AsyncClientStreamingCall<global::Math.Num, global::Math.Num> Sum(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Sum sums a stream of numbers, returning the final result once the stream
-      ///  is closed.
-      /// </summary>
-      AsyncClientStreamingCall<global::Math.Num, global::Math.Num> Sum(CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of Math</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface IMath
-    {
-      /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Math.DivReply> Div(global::Math.DivArgs request, ServerCallContext context);
-      /// <summary>
-      ///  DivMany accepts an arbitrary number of division args from the client stream
-      ///  and sends back the results in the reply stream.  The stream continues until
-      ///  the client closes its end; the server does the same after sending all the
-      ///  replies.  The stream ends immediately if either end aborts.
-      /// </summary>
-      global::System.Threading.Tasks.Task DivMany(IAsyncStreamReader<global::Math.DivArgs> requestStream, IServerStreamWriter<global::Math.DivReply> responseStream, ServerCallContext context);
-      /// <summary>
-      ///  Fib generates numbers in the Fibonacci sequence.  If args.limit > 0, Fib
-      ///  generates up to limit numbers; otherwise it continues until the call is
-      ///  canceled.  Unlike Fib above, Fib has no final FibReply.
-      /// </summary>
-      global::System.Threading.Tasks.Task Fib(global::Math.FibArgs request, IServerStreamWriter<global::Math.Num> responseStream, ServerCallContext context);
-      /// <summary>
-      ///  Sum sums a stream of numbers, returning the final result once the stream
-      ///  is closed.
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Math.Num> Sum(IAsyncStreamReader<global::Math.Num> requestStream, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of Math</summary>
     public abstract class MathBase
     {
       /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
+      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      ///  and remainder.
       /// </summary>
       public virtual global::System.Threading.Tasks.Task<global::Math.DivReply> Div(global::Math.DivArgs request, ServerCallContext context)
       {
@@ -196,7 +105,7 @@ namespace Math {
       }
 
       /// <summary>
-      ///  Fib generates numbers in the Fibonacci sequence.  If args.limit > 0, Fib
+      ///  Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
       ///  generates up to limit numbers; otherwise it continues until the call is
       ///  canceled.  Unlike Fib above, Fib has no final FibReply.
       /// </summary>
@@ -217,9 +126,7 @@ namespace Math {
     }
 
     /// <summary>Client for Math</summary>
-    #pragma warning disable 0618
-    public class MathClient : ClientBase<MathClient>, IMathClient
-    #pragma warning restore 0618
+    public class MathClient : ClientBase<MathClient>
     {
       public MathClient(Channel channel) : base(channel)
       {
@@ -237,32 +144,32 @@ namespace Math {
       }
 
       /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
+      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      ///  and remainder.
       /// </summary>
       public virtual global::Math.DivReply Div(global::Math.DivArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return Div(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
+      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      ///  and remainder.
       /// </summary>
       public virtual global::Math.DivReply Div(global::Math.DivArgs request, CallOptions options)
       {
         return CallInvoker.BlockingUnaryCall(__Method_Div, null, options, request);
       }
       /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
+      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      ///  and remainder.
       /// </summary>
       public virtual AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
       {
         return DivAsync(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Div divides args.dividend by args.divisor and returns the quotient and
-      ///  remainder.
+      ///  Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+      ///  and remainder.
       /// </summary>
       public virtual AsyncUnaryCall<global::Math.DivReply> DivAsync(global::Math.DivArgs request, CallOptions options)
       {
@@ -289,7 +196,7 @@ namespace Math {
         return CallInvoker.AsyncDuplexStreamingCall(__Method_DivMany, null, options);
       }
       /// <summary>
-      ///  Fib generates numbers in the Fibonacci sequence.  If args.limit > 0, Fib
+      ///  Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
       ///  generates up to limit numbers; otherwise it continues until the call is
       ///  canceled.  Unlike Fib above, Fib has no final FibReply.
       /// </summary>
@@ -298,7 +205,7 @@ namespace Math {
         return Fib(request, new CallOptions(headers, deadline, cancellationToken));
       }
       /// <summary>
-      ///  Fib generates numbers in the Fibonacci sequence.  If args.limit > 0, Fib
+      ///  Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
       ///  generates up to limit numbers; otherwise it continues until the call is
       ///  canceled.  Unlike Fib above, Fib has no final FibReply.
       /// </summary>
@@ -335,23 +242,9 @@ namespace Math {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(IMath serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_Div, serviceImpl.Div)
-          .AddMethod(__Method_DivMany, serviceImpl.DivMany)
-          .AddMethod(__Method_Fib, serviceImpl.Fib)
-          .AddMethod(__Method_Sum, serviceImpl.Sum).Build();
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(MathBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_Div, serviceImpl.Div)
           .AddMethod(__Method_DivMany, serviceImpl.DivMany)
           .AddMethod(__Method_Fib, serviceImpl.Fib)
diff --git a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
index 51c6a39b1d8fa7bd1ea908fcaea3aa2222423127..d0ade7d02bec8a2211035acd86623971a1f038c0 100644
--- a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
+++ b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
@@ -58,23 +58,6 @@ namespace Grpc.Health.V1 {
       get { return global::Grpc.Health.V1.HealthReflection.Descriptor.Services[0]; }
     }
 
-    /// <summary>Client for Health</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface IHealthClient
-    {
-      global::Grpc.Health.V1.HealthCheckResponse Check(global::Grpc.Health.V1.HealthCheckRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      global::Grpc.Health.V1.HealthCheckResponse Check(global::Grpc.Health.V1.HealthCheckRequest request, CallOptions options);
-      AsyncUnaryCall<global::Grpc.Health.V1.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1.HealthCheckRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      AsyncUnaryCall<global::Grpc.Health.V1.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1.HealthCheckRequest request, CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of Health</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface IHealth
-    {
-      global::System.Threading.Tasks.Task<global::Grpc.Health.V1.HealthCheckResponse> Check(global::Grpc.Health.V1.HealthCheckRequest request, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of Health</summary>
     public abstract class HealthBase
     {
@@ -86,9 +69,7 @@ namespace Grpc.Health.V1 {
     }
 
     /// <summary>Client for Health</summary>
-    #pragma warning disable 0618
-    public class HealthClient : ClientBase<HealthClient>, IHealthClient
-    #pragma warning restore 0618
+    public class HealthClient : ClientBase<HealthClient>
     {
       public HealthClient(Channel channel) : base(channel)
       {
@@ -134,20 +115,9 @@ namespace Grpc.Health.V1 {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(IHealth serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_Check, serviceImpl.Check).Build();
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(HealthBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_Check, serviceImpl.Check).Build();
     }
 
diff --git a/src/csharp/Grpc.IntegrationTesting/GenericService.cs b/src/csharp/Grpc.IntegrationTesting/GenericService.cs
index c6128264ac56776f5e92cf9314f723259c64cfb5..53fa1ee5f60c04782578881d1861bf322224978a 100644
--- a/src/csharp/Grpc.IntegrationTesting/GenericService.cs
+++ b/src/csharp/Grpc.IntegrationTesting/GenericService.cs
@@ -64,7 +64,7 @@ namespace Grpc.IntegrationTesting
 
         public static ServerServiceDefinition BindHandler(DuplexStreamingServerMethod<byte[], byte[]> handler)
         {
-            return ServerServiceDefinition.CreateBuilder(StreamingCallMethod.ServiceName)
+            return ServerServiceDefinition.CreateBuilder()
                 .AddMethod(StreamingCallMethod, handler).Build();
         }
     }
diff --git a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
index 9d31d1c5146c6e3bc71105bca12ec7d9044dffca..22bd27ec0aa5ba57c8a3e57702d92274dca18118 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
@@ -72,53 +72,6 @@ namespace Grpc.Testing {
       get { return global::Grpc.Testing.MetricsReflection.Descriptor.Services[0]; }
     }
 
-    /// <summary>Client for MetricsService</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface IMetricsServiceClient
-    {
-      /// <summary>
-      ///  Returns the values of all the gauges that are currently being maintained by
-      ///  the service
-      /// </summary>
-      AsyncServerStreamingCall<global::Grpc.Testing.GaugeResponse> GetAllGauges(global::Grpc.Testing.EmptyMessage request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Returns the values of all the gauges that are currently being maintained by
-      ///  the service
-      /// </summary>
-      AsyncServerStreamingCall<global::Grpc.Testing.GaugeResponse> GetAllGauges(global::Grpc.Testing.EmptyMessage request, CallOptions options);
-      /// <summary>
-      ///  Returns the value of one gauge
-      /// </summary>
-      global::Grpc.Testing.GaugeResponse GetGauge(global::Grpc.Testing.GaugeRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Returns the value of one gauge
-      /// </summary>
-      global::Grpc.Testing.GaugeResponse GetGauge(global::Grpc.Testing.GaugeRequest request, CallOptions options);
-      /// <summary>
-      ///  Returns the value of one gauge
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.GaugeResponse> GetGaugeAsync(global::Grpc.Testing.GaugeRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Returns the value of one gauge
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.GaugeResponse> GetGaugeAsync(global::Grpc.Testing.GaugeRequest request, CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of MetricsService</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface IMetricsService
-    {
-      /// <summary>
-      ///  Returns the values of all the gauges that are currently being maintained by
-      ///  the service
-      /// </summary>
-      global::System.Threading.Tasks.Task GetAllGauges(global::Grpc.Testing.EmptyMessage request, IServerStreamWriter<global::Grpc.Testing.GaugeResponse> responseStream, ServerCallContext context);
-      /// <summary>
-      ///  Returns the value of one gauge
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.GaugeResponse> GetGauge(global::Grpc.Testing.GaugeRequest request, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of MetricsService</summary>
     public abstract class MetricsServiceBase
     {
@@ -142,9 +95,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for MetricsService</summary>
-    #pragma warning disable 0618
-    public class MetricsServiceClient : ClientBase<MetricsServiceClient>, IMetricsServiceClient
-    #pragma warning restore 0618
+    public class MetricsServiceClient : ClientBase<MetricsServiceClient>
     {
       public MetricsServiceClient(Channel channel) : base(channel)
       {
@@ -218,21 +169,9 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(IMetricsService serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_GetAllGauges, serviceImpl.GetAllGauges)
-          .AddMethod(__Method_GetGauge, serviceImpl.GetGauge).Build();
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(MetricsServiceBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_GetAllGauges, serviceImpl.GetAllGauges)
           .AddMethod(__Method_GetGauge, serviceImpl.GetGauge).Build();
     }
diff --git a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
index f7071ebf6bebeeeec86c81c79cc72463e0cddec8..9c99296115ce4a7f40f8c5479f053e17e19fcd56 100644
--- a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
@@ -67,58 +67,6 @@ namespace Grpc.Testing {
       get { return global::Grpc.Testing.ServicesReflection.Descriptor.Services[0]; }
     }
 
-    /// <summary>Client for BenchmarkService</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface IBenchmarkServiceClient
-    {
-      /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
-      /// </summary>
-      global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
-      /// </summary>
-      global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, CallOptions options);
-      /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, CallOptions options);
-      /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> StreamingCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.SimpleRequest, global::Grpc.Testing.SimpleResponse> StreamingCall(CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of BenchmarkService</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface IBenchmarkService
-    {
-      /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> UnaryCall(global::Grpc.Testing.SimpleRequest request, ServerCallContext context);
-      /// <summary>
-      ///  One request followed by one response.
-      ///  The server returns the client payload as-is.
-      /// </summary>
-      global::System.Threading.Tasks.Task StreamingCall(IAsyncStreamReader<global::Grpc.Testing.SimpleRequest> requestStream, IServerStreamWriter<global::Grpc.Testing.SimpleResponse> responseStream, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of BenchmarkService</summary>
     public abstract class BenchmarkServiceBase
     {
@@ -143,9 +91,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for BenchmarkService</summary>
-    #pragma warning disable 0618
-    public class BenchmarkServiceClient : ClientBase<BenchmarkServiceClient>, IBenchmarkServiceClient
-    #pragma warning restore 0618
+    public class BenchmarkServiceClient : ClientBase<BenchmarkServiceClient>
     {
       public BenchmarkServiceClient(Channel channel) : base(channel)
       {
@@ -223,21 +169,9 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(IBenchmarkService serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_UnaryCall, serviceImpl.UnaryCall)
-          .AddMethod(__Method_StreamingCall, serviceImpl.StreamingCall).Build();
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(BenchmarkServiceBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_UnaryCall, serviceImpl.UnaryCall)
           .AddMethod(__Method_StreamingCall, serviceImpl.StreamingCall).Build();
     }
@@ -289,112 +223,6 @@ namespace Grpc.Testing {
       get { return global::Grpc.Testing.ServicesReflection.Descriptor.Services[1]; }
     }
 
-    /// <summary>Client for WorkerService</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface IWorkerServiceClient
-    {
-      /// <summary>
-      ///  Start server with specified workload.
-      ///  First request sent specifies the ServerConfig followed by ServerStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test server
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> RunServer(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Start server with specified workload.
-      ///  First request sent specifies the ServerConfig followed by ServerStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test server
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.ServerArgs, global::Grpc.Testing.ServerStatus> RunServer(CallOptions options);
-      /// <summary>
-      ///  Start client with specified workload.
-      ///  First request sent specifies the ClientConfig followed by ClientStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test client
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Start client with specified workload.
-      ///  First request sent specifies the ClientConfig followed by ClientStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test client
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.ClientArgs, global::Grpc.Testing.ClientStatus> RunClient(CallOptions options);
-      /// <summary>
-      ///  Just return the core count - unary call
-      /// </summary>
-      global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Just return the core count - unary call
-      /// </summary>
-      global::Grpc.Testing.CoreResponse CoreCount(global::Grpc.Testing.CoreRequest request, CallOptions options);
-      /// <summary>
-      ///  Just return the core count - unary call
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Just return the core count - unary call
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.CoreResponse> CoreCountAsync(global::Grpc.Testing.CoreRequest request, CallOptions options);
-      /// <summary>
-      ///  Quit this worker
-      /// </summary>
-      global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Quit this worker
-      /// </summary>
-      global::Grpc.Testing.Void QuitWorker(global::Grpc.Testing.Void request, CallOptions options);
-      /// <summary>
-      ///  Quit this worker
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Quit this worker
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.Void> QuitWorkerAsync(global::Grpc.Testing.Void request, CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of WorkerService</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface IWorkerService
-    {
-      /// <summary>
-      ///  Start server with specified workload.
-      ///  First request sent specifies the ServerConfig followed by ServerStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test server
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
-      /// </summary>
-      global::System.Threading.Tasks.Task RunServer(IAsyncStreamReader<global::Grpc.Testing.ServerArgs> requestStream, IServerStreamWriter<global::Grpc.Testing.ServerStatus> responseStream, ServerCallContext context);
-      /// <summary>
-      ///  Start client with specified workload.
-      ///  First request sent specifies the ClientConfig followed by ClientStatus
-      ///  response. After that, a "Mark" can be sent anytime to request the latest
-      ///  stats. Closing the stream will initiate shutdown of the test client
-      ///  and once the shutdown has finished, the OK status is sent to terminate
-      ///  this RPC.
-      /// </summary>
-      global::System.Threading.Tasks.Task RunClient(IAsyncStreamReader<global::Grpc.Testing.ClientArgs> requestStream, IServerStreamWriter<global::Grpc.Testing.ClientStatus> responseStream, ServerCallContext context);
-      /// <summary>
-      ///  Just return the core count - unary call
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.CoreResponse> CoreCount(global::Grpc.Testing.CoreRequest request, ServerCallContext context);
-      /// <summary>
-      ///  Quit this worker
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.Void> QuitWorker(global::Grpc.Testing.Void request, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of WorkerService</summary>
     public abstract class WorkerServiceBase
     {
@@ -443,9 +271,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for WorkerService</summary>
-    #pragma warning disable 0618
-    public class WorkerServiceClient : ClientBase<WorkerServiceClient>, IWorkerServiceClient
-    #pragma warning restore 0618
+    public class WorkerServiceClient : ClientBase<WorkerServiceClient>
     {
       public WorkerServiceClient(Channel channel) : base(channel)
       {
@@ -579,23 +405,9 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(IWorkerService serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_RunServer, serviceImpl.RunServer)
-          .AddMethod(__Method_RunClient, serviceImpl.RunClient)
-          .AddMethod(__Method_CoreCount, serviceImpl.CoreCount)
-          .AddMethod(__Method_QuitWorker, serviceImpl.QuitWorker).Build();
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(WorkerServiceBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_RunServer, serviceImpl.RunServer)
           .AddMethod(__Method_RunClient, serviceImpl.RunClient)
           .AddMethod(__Method_CoreCount, serviceImpl.CoreCount)
diff --git a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
index cf43a77118cf0b60ab0d361f6a7a8824149213bd..6c252013f84cd15e86a4b6f72abe6e5421915956 100644
--- a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
@@ -105,127 +105,6 @@ namespace Grpc.Testing {
       get { return global::Grpc.Testing.TestReflection.Descriptor.Services[0]; }
     }
 
-    /// <summary>Client for TestService</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface ITestServiceClient
-    {
-      /// <summary>
-      ///  One empty request followed by one empty response.
-      /// </summary>
-      global::Grpc.Testing.Empty EmptyCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  One empty request followed by one empty response.
-      /// </summary>
-      global::Grpc.Testing.Empty EmptyCall(global::Grpc.Testing.Empty request, CallOptions options);
-      /// <summary>
-      ///  One empty request followed by one empty response.
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.Empty> EmptyCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  One empty request followed by one empty response.
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.Empty> EmptyCallAsync(global::Grpc.Testing.Empty request, CallOptions options);
-      /// <summary>
-      ///  One request followed by one response.
-      /// </summary>
-      global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  One request followed by one response.
-      /// </summary>
-      global::Grpc.Testing.SimpleResponse UnaryCall(global::Grpc.Testing.SimpleRequest request, CallOptions options);
-      /// <summary>
-      ///  One request followed by one response.
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  One request followed by one response.
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.SimpleResponse> UnaryCallAsync(global::Grpc.Testing.SimpleRequest request, CallOptions options);
-      /// <summary>
-      ///  One request followed by a sequence of responses (streamed download).
-      ///  The server returns the payload with client desired type and sizes.
-      /// </summary>
-      AsyncServerStreamingCall<global::Grpc.Testing.StreamingOutputCallResponse> StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  One request followed by a sequence of responses (streamed download).
-      ///  The server returns the payload with client desired type and sizes.
-      /// </summary>
-      AsyncServerStreamingCall<global::Grpc.Testing.StreamingOutputCallResponse> StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, CallOptions options);
-      /// <summary>
-      ///  A sequence of requests followed by one response (streamed upload).
-      ///  The server returns the aggregated size of client payload as the result.
-      /// </summary>
-      AsyncClientStreamingCall<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A sequence of requests followed by one response (streamed upload).
-      ///  The server returns the aggregated size of client payload as the result.
-      /// </summary>
-      AsyncClientStreamingCall<global::Grpc.Testing.StreamingInputCallRequest, global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(CallOptions options);
-      /// <summary>
-      ///  A sequence of requests with each request served by the server immediately.
-      ///  As one request could lead to multiple responses, this interface
-      ///  demonstrates the idea of full duplexing.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> FullDuplexCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A sequence of requests with each request served by the server immediately.
-      ///  As one request could lead to multiple responses, this interface
-      ///  demonstrates the idea of full duplexing.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> FullDuplexCall(CallOptions options);
-      /// <summary>
-      ///  A sequence of requests followed by a sequence of responses.
-      ///  The server buffers all the client requests and then serves them in order. A
-      ///  stream of responses are returned to the client when the server starts with
-      ///  first request.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> HalfDuplexCall(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A sequence of requests followed by a sequence of responses.
-      ///  The server buffers all the client requests and then serves them in order. A
-      ///  stream of responses are returned to the client when the server starts with
-      ///  first request.
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Grpc.Testing.StreamingOutputCallRequest, global::Grpc.Testing.StreamingOutputCallResponse> HalfDuplexCall(CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of TestService</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface ITestService
-    {
-      /// <summary>
-      ///  One empty request followed by one empty response.
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> EmptyCall(global::Grpc.Testing.Empty request, ServerCallContext context);
-      /// <summary>
-      ///  One request followed by one response.
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.SimpleResponse> UnaryCall(global::Grpc.Testing.SimpleRequest request, ServerCallContext context);
-      /// <summary>
-      ///  One request followed by a sequence of responses (streamed download).
-      ///  The server returns the payload with client desired type and sizes.
-      /// </summary>
-      global::System.Threading.Tasks.Task StreamingOutputCall(global::Grpc.Testing.StreamingOutputCallRequest request, IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, ServerCallContext context);
-      /// <summary>
-      ///  A sequence of requests followed by one response (streamed upload).
-      ///  The server returns the aggregated size of client payload as the result.
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.StreamingInputCallResponse> StreamingInputCall(IAsyncStreamReader<global::Grpc.Testing.StreamingInputCallRequest> requestStream, ServerCallContext context);
-      /// <summary>
-      ///  A sequence of requests with each request served by the server immediately.
-      ///  As one request could lead to multiple responses, this interface
-      ///  demonstrates the idea of full duplexing.
-      /// </summary>
-      global::System.Threading.Tasks.Task FullDuplexCall(IAsyncStreamReader<global::Grpc.Testing.StreamingOutputCallRequest> requestStream, IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, ServerCallContext context);
-      /// <summary>
-      ///  A sequence of requests followed by a sequence of responses.
-      ///  The server buffers all the client requests and then serves them in order. A
-      ///  stream of responses are returned to the client when the server starts with
-      ///  first request.
-      /// </summary>
-      global::System.Threading.Tasks.Task HalfDuplexCall(IAsyncStreamReader<global::Grpc.Testing.StreamingOutputCallRequest> requestStream, IServerStreamWriter<global::Grpc.Testing.StreamingOutputCallResponse> responseStream, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of TestService</summary>
     public abstract class TestServiceBase
     {
@@ -287,9 +166,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for TestService</summary>
-    #pragma warning disable 0618
-    public class TestServiceClient : ClientBase<TestServiceClient>, ITestServiceClient
-    #pragma warning restore 0618
+    public class TestServiceClient : ClientBase<TestServiceClient>
     {
       public TestServiceClient(Channel channel) : base(channel)
       {
@@ -445,25 +322,9 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(ITestService serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_EmptyCall, serviceImpl.EmptyCall)
-          .AddMethod(__Method_UnaryCall, serviceImpl.UnaryCall)
-          .AddMethod(__Method_StreamingOutputCall, serviceImpl.StreamingOutputCall)
-          .AddMethod(__Method_StreamingInputCall, serviceImpl.StreamingInputCall)
-          .AddMethod(__Method_FullDuplexCall, serviceImpl.FullDuplexCall)
-          .AddMethod(__Method_HalfDuplexCall, serviceImpl.HalfDuplexCall).Build();
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(TestServiceBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_EmptyCall, serviceImpl.EmptyCall)
           .AddMethod(__Method_UnaryCall, serviceImpl.UnaryCall)
           .AddMethod(__Method_StreamingOutputCall, serviceImpl.StreamingOutputCall)
@@ -496,38 +357,6 @@ namespace Grpc.Testing {
       get { return global::Grpc.Testing.TestReflection.Descriptor.Services[1]; }
     }
 
-    /// <summary>Client for UnimplementedService</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface IUnimplementedServiceClient
-    {
-      /// <summary>
-      ///  A call that no server should implement
-      /// </summary>
-      global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A call that no server should implement
-      /// </summary>
-      global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, CallOptions options);
-      /// <summary>
-      ///  A call that no server should implement
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A call that no server should implement
-      /// </summary>
-      AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of UnimplementedService</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface IUnimplementedService
-    {
-      /// <summary>
-      ///  A call that no server should implement
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> UnimplementedCall(global::Grpc.Testing.Empty request, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of UnimplementedService</summary>
     public abstract class UnimplementedServiceBase
     {
@@ -542,9 +371,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for UnimplementedService</summary>
-    #pragma warning disable 0618
-    public class UnimplementedServiceClient : ClientBase<UnimplementedServiceClient>, IUnimplementedServiceClient
-    #pragma warning restore 0618
+    public class UnimplementedServiceClient : ClientBase<UnimplementedServiceClient>
     {
       public UnimplementedServiceClient(Channel channel) : base(channel)
       {
@@ -602,20 +429,9 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(IUnimplementedService serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_UnimplementedCall, serviceImpl.UnimplementedCall).Build();
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(UnimplementedServiceBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_UnimplementedCall, serviceImpl.UnimplementedCall).Build();
     }
 
@@ -651,28 +467,6 @@ namespace Grpc.Testing {
       get { return global::Grpc.Testing.TestReflection.Descriptor.Services[2]; }
     }
 
-    /// <summary>Client for ReconnectService</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface IReconnectServiceClient
-    {
-      global::Grpc.Testing.Empty Start(global::Grpc.Testing.ReconnectParams request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      global::Grpc.Testing.Empty Start(global::Grpc.Testing.ReconnectParams request, CallOptions options);
-      AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.ReconnectParams request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.ReconnectParams request, CallOptions options);
-      global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, CallOptions options);
-      AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of ReconnectService</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface IReconnectService
-    {
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.Empty> Start(global::Grpc.Testing.ReconnectParams request, ServerCallContext context);
-      global::System.Threading.Tasks.Task<global::Grpc.Testing.ReconnectInfo> Stop(global::Grpc.Testing.Empty request, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of ReconnectService</summary>
     public abstract class ReconnectServiceBase
     {
@@ -689,9 +483,7 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Client for ReconnectService</summary>
-    #pragma warning disable 0618
-    public class ReconnectServiceClient : ClientBase<ReconnectServiceClient>, IReconnectServiceClient
-    #pragma warning restore 0618
+    public class ReconnectServiceClient : ClientBase<ReconnectServiceClient>
     {
       public ReconnectServiceClient(Channel channel) : base(channel)
       {
@@ -753,21 +545,9 @@ namespace Grpc.Testing {
     }
 
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(IReconnectService serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_Start, serviceImpl.Start)
-          .AddMethod(__Method_Stop, serviceImpl.Stop).Build();
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(ReconnectServiceBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_Start, serviceImpl.Start)
           .AddMethod(__Method_Stop, serviceImpl.Stop).Build();
     }
diff --git a/src/csharp/tests.json b/src/csharp/tests.json
index f6af3408d51ac92c26d40d1e41aa210ce7db8a3b..7e7aee1093a3ddad7b6b5a4ab9562dab234d0275 100644
--- a/src/csharp/tests.json
+++ b/src/csharp/tests.json
@@ -7,6 +7,7 @@
     "Grpc.Core.Internal.Tests.CompletionQueueSafeHandleTest",
     "Grpc.Core.Internal.Tests.MetadataArraySafeHandleTest",
     "Grpc.Core.Internal.Tests.TimespecTest",
+    "Grpc.Core.Tests.AppDomainUnloadTest",
     "Grpc.Core.Tests.CallCredentialsTest",
     "Grpc.Core.Tests.CallOptionsTest",
     "Grpc.Core.Tests.ChannelCredentialsTest",
@@ -25,6 +26,9 @@
     "Grpc.Core.Tests.ResponseHeadersTest",
     "Grpc.Core.Tests.SanityTest",
     "Grpc.Core.Tests.ServerTest",
+    "Grpc.Core.Tests.ShutdownHookClientTest",
+    "Grpc.Core.Tests.ShutdownHookPendingCallTest",
+    "Grpc.Core.Tests.ShutdownHookServerTest",
     "Grpc.Core.Tests.ShutdownTest",
     "Grpc.Core.Tests.TimeoutsTest",
     "Grpc.Core.Tests.UserAgentStringTest"
diff --git a/src/objective-c/GRPCClient/GRPCCall+Cronet.h b/src/objective-c/GRPCClient/GRPCCall+Cronet.h
index 7f7fc6c2a96f0d395ae7cb48bc17fe4f5827371c..2d8f7ac8fb9b3482ac851b68514d5e2692685494 100644
--- a/src/objective-c/GRPCClient/GRPCCall+Cronet.h
+++ b/src/objective-c/GRPCClient/GRPCCall+Cronet.h
@@ -30,6 +30,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
+#ifdef GRPC_COMPILE_WITH_CRONET
 #import <Cronet/Cronet.h>
 
 #import "GRPCCall.h"
@@ -53,3 +54,4 @@
 +(BOOL)isUsingCronet;
 
 @end
+#endif
diff --git a/src/objective-c/GRPCClient/GRPCCall+Cronet.m b/src/objective-c/GRPCClient/GRPCCall+Cronet.m
index 69a410e95ac84909b1996e79cf903a8a9422893b..76ca1a2537c8048ed7dd34b7765aa89981783679 100644
--- a/src/objective-c/GRPCClient/GRPCCall+Cronet.m
+++ b/src/objective-c/GRPCClient/GRPCCall+Cronet.m
@@ -33,6 +33,7 @@
 
 #import "GRPCCall+Cronet.h"
 
+#ifdef GRPC_COMPILE_WITH_CRONET
 static BOOL useCronet = NO;
 static cronet_engine *globalCronetEngine;
 
@@ -52,3 +53,4 @@ static cronet_engine *globalCronetEngine;
 }
 
 @end
+#endif
diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.h b/src/objective-c/GRPCClient/private/GRPCChannel.h
index 3219835d0293354278bdd1ec88dfe96c084915db..40e78a92d6d9e587f99f263965a2d2db9df90e22 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.h
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.h
@@ -58,9 +58,10 @@ struct grpc_channel_credentials;
 /**
  * Creates a secure channel to the specified @c host using Cronet as a transport mechanism.
  */
+#ifdef GRPC_COMPILE_WITH_CRONET
 + (nullable GRPCChannel *)secureCronetChannelWithHost:(NSString *)host
                                           channelArgs:(NSDictionary *)channelArgs;
-
+#endif
 /**
  * Creates a secure channel to the specified @c host using the specified @c credentials and
  * @c channelArgs. Only in tests should @c GRPC_SSL_TARGET_NAME_OVERRIDE_ARG channel arg be set.
diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.m b/src/objective-c/GRPCClient/private/GRPCChannel.m
index e4e0dbe6d2c773f269f3614eb6608ec544d330ae..d3192c983d1d0da09780acda07511135654281a7 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.m
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.m
@@ -34,13 +34,17 @@
 #import "GRPCChannel.h"
 
 #include <grpc/grpc_security.h>
+#ifdef GRPC_COMPILE_WITH_CRONET
 #include <grpc/grpc_cronet.h>
+#endif
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
+#ifdef GRPC_COMPILE_WITH_CRONET
 #import <Cronet/Cronet.h>
 #import <GRPCClient/GRPCCall+Cronet.h>
+#endif
 #import "GRPCCompletionQueue.h"
 
 void freeChannelArgs(grpc_channel_args *channel_args) {
@@ -102,6 +106,7 @@ grpc_channel_args * buildChannelArgs(NSDictionary *dictionary) {
   grpc_channel_args *_channelArgs;
 }
 
+#ifdef GRPC_COMPILE_WITH_CRONET
 - (instancetype)initWithHost:(NSString *)host
                 cronetEngine:(cronet_engine *)cronetEngine
                  channelArgs:(NSDictionary *)channelArgs {
@@ -118,6 +123,7 @@ grpc_channel_args * buildChannelArgs(NSDictionary *dictionary) {
 
   return self;
 }
+#endif
 
 - (instancetype)initWithHost:(NSString *)host
                       secure:(BOOL)secure
@@ -152,6 +158,7 @@ grpc_channel_args * buildChannelArgs(NSDictionary *dictionary) {
   freeChannelArgs(_channelArgs);
 }
 
+#ifdef GRPC_COMPILE_WITH_CRONET
 + (GRPCChannel *)secureCronetChannelWithHost:(NSString *)host
                                  channelArgs:(NSDictionary *)channelArgs {
   cronet_engine *engine = [GRPCCall cronetEngine];
@@ -162,6 +169,7 @@ grpc_channel_args * buildChannelArgs(NSDictionary *dictionary) {
   }
   return [[GRPCChannel alloc] initWithHost:host cronetEngine:engine channelArgs:channelArgs];
 }
+#endif
 
 + (GRPCChannel *)secureChannelWithHost:(NSString *)host {
   return [[GRPCChannel alloc] initWithHost:host secure:YES credentials:NULL channelArgs:NULL];
diff --git a/src/objective-c/GRPCClient/private/GRPCHost.m b/src/objective-c/GRPCClient/private/GRPCHost.m
index 7da508810ce0bc4b55a7cfdd23367b06da0f1f13..fef6385cea4d2e8c8ea23869ecd6024ba385747d 100644
--- a/src/objective-c/GRPCClient/private/GRPCHost.m
+++ b/src/objective-c/GRPCClient/private/GRPCHost.m
@@ -36,8 +36,10 @@
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
 #import <GRPCClient/GRPCCall.h>
+#ifdef GRPC_COMPILE_WITH_CRONET
 #import <GRPCClient/GRPCCall+ChannelArg.h>
 #import <GRPCClient/GRPCCall+Cronet.h>
+#endif
 
 #import "GRPCChannel.h"
 #import "GRPCCompletionQueue.h"
@@ -201,17 +203,22 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (GRPCChannel *)newChannel {
   NSDictionary *args = [self channelArgs];
+#ifdef GRPC_COMPILE_WITH_CRONET
   BOOL useCronet = [GRPCCall isUsingCronet];
+#endif
   if (_secure) {
       GRPCChannel *channel;
       @synchronized(self) {
         if (_channelCreds == nil) {
           [self setTLSPEMRootCerts:nil withPrivateKey:nil withCertChain:nil error:nil];
         }
+#ifdef GRPC_COMPILE_WITH_CRONET
         if (useCronet) {
           channel = [GRPCChannel secureCronetChannelWithHost:_address
                                                  channelArgs:args];
-        } else {
+        } else
+#endif
+        {
           channel = [GRPCChannel secureChannelWithHost:_address
                                             credentials:_channelCreds
                                             channelArgs:args];
diff --git a/src/proto/math/math.proto b/src/proto/math/math.proto
index 311e148c021f66a8ed450e8258c60961314f546f..269c60bde832153bc00f00bf3cb89a462065d975 100644
--- a/src/proto/math/math.proto
+++ b/src/proto/math/math.proto
@@ -55,8 +55,8 @@ message FibReply {
 }
 
 service Math {
-  // Div divides args.dividend by args.divisor and returns the quotient and
-  // remainder.
+  // Div divides DivArgs.dividend by DivArgs.divisor and returns the quotient
+  // and remainder.
   rpc Div (DivArgs) returns (DivReply) {
   }
 
@@ -67,7 +67,7 @@ service Math {
   rpc DivMany (stream DivArgs) returns (stream DivReply) {
   }
 
-  // Fib generates numbers in the Fibonacci sequence.  If args.limit > 0, Fib
+  // Fib generates numbers in the Fibonacci sequence.  If FibArgs.limit > 0, Fib
   // generates up to limit numbers; otherwise it continues until the call is
   // canceled.  Unlike Fib above, Fib has no final FibReply.
   rpc Fib (FibArgs) returns (stream Num) {
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index bbf04ad03e88358145d430792d5b12ec8f9f2e93..5ba5a4e1fdd192b39a462c1309885e4f6f336b5b 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -947,6 +947,21 @@ def metadata_call_credentials(metadata_plugin, name=None):
           metadata_plugin, effective_name))
 
 
+def access_token_call_credentials(access_token):
+  """Construct CallCredentials from an access token.
+
+  Args:
+    access_token: A string to place directly in the http request
+      authorization header, ie "Authorization: Bearer <access_token>".
+
+  Returns:
+    A CallCredentials.
+  """
+  from grpc import _auth
+  return metadata_call_credentials(
+      _auth.AccessTokenCallCredentials(access_token))
+
+
 def composite_call_credentials(call_credentials, additional_call_credentials):
   """Compose two CallCredentials to make a new one.
 
diff --git a/src/python/grpcio/grpc/_adapter/_implementations.py b/src/python/grpcio/grpc/_adapter/_implementations.py
deleted file mode 100644
index b85f228bf69ee37c7524b73d551c88f6f98953fb..0000000000000000000000000000000000000000
--- a/src/python/grpcio/grpc/_adapter/_implementations.py
+++ /dev/null
@@ -1,48 +0,0 @@
-# Copyright 2015, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-import collections
-
-from grpc.beta import interfaces
-
-class AuthMetadataContext(collections.namedtuple(
-    'AuthMetadataContext', [
-        'service_url',
-        'method_name'
-    ]), interfaces.GRPCAuthMetadataContext):
-  pass
-
-
-class AuthMetadataPluginCallback(interfaces.GRPCAuthMetadataContext):
-
-  def __init__(self, callback):
-    self._callback = callback
-
-  def __call__(self, metadata, error):
-    self._callback(metadata, error)
diff --git a/src/python/grpcio/grpc/_adapter/_low.py b/src/python/grpcio/grpc/_adapter/_low.py
index 00788bd4cf83cd18da118a87cc2f4b3ba0edbc45..48410167a07b6fb4e79ba284f5f667f1dabb62c5 100644
--- a/src/python/grpcio/grpc/_adapter/_low.py
+++ b/src/python/grpcio/grpc/_adapter/_low.py
@@ -30,8 +30,8 @@
 import threading
 
 from grpc import _grpcio_metadata
+from grpc import _plugin_wrapping
 from grpc._cython import cygrpc
-from grpc._adapter import _implementations
 from grpc._adapter import _types
 
 _USER_AGENT = 'Python-gRPC-{}'.format(_grpcio_metadata.__version__)
@@ -57,78 +57,8 @@ def channel_credentials_ssl(
   return cygrpc.channel_credentials_ssl(root_certificates, pair)
 
 
-class _WrappedCygrpcCallback(object):
-
-  def __init__(self, cygrpc_callback):
-    self.is_called = False
-    self.error = None
-    self.is_called_lock = threading.Lock()
-    self.cygrpc_callback = cygrpc_callback
-
-  def _invoke_failure(self, error):
-    # TODO(atash) translate different Exception superclasses into different
-    # status codes.
-    self.cygrpc_callback(
-        cygrpc.Metadata([]), cygrpc.StatusCode.internal, error.message)
-
-  def _invoke_success(self, metadata):
-    try:
-      cygrpc_metadata = cygrpc.Metadata(
-          cygrpc.Metadatum(key, value)
-          for key, value in metadata)
-    except Exception as error:
-      self._invoke_failure(error)
-      return
-    self.cygrpc_callback(cygrpc_metadata, cygrpc.StatusCode.ok, '')
-
-  def __call__(self, metadata, error):
-    with self.is_called_lock:
-      if self.is_called:
-        raise RuntimeError('callback should only ever be invoked once')
-      if self.error:
-        self._invoke_failure(self.error)
-        return
-      self.is_called = True
-    if error is None:
-      self._invoke_success(metadata)
-    else:
-      self._invoke_failure(error)
-
-  def notify_failure(self, error):
-    with self.is_called_lock:
-      if not self.is_called:
-        self.error = error
-
-
-class _WrappedPlugin(object):
-
-  def __init__(self, plugin):
-    self.plugin = plugin
-
-  def __call__(self, context, cygrpc_callback):
-    wrapped_cygrpc_callback = _WrappedCygrpcCallback(cygrpc_callback)
-    wrapped_context = _implementations.AuthMetadataContext(context.service_url,
-                                                           context.method_name)
-    try:
-      self.plugin(
-          wrapped_context,
-          _implementations.AuthMetadataPluginCallback(wrapped_cygrpc_callback))
-    except Exception as error:
-      wrapped_cygrpc_callback.notify_failure(error)
-      raise
-
-
-def call_credentials_metadata_plugin(plugin, name):
-  """
-  Args:
-    plugin: A callable accepting a _types.AuthMetadataContext
-      object and a callback (itself accepting a list of metadata key/value
-      2-tuples and a None-able exception value). The callback must be eventually
-      called, but need not be called in plugin's invocation.
-      plugin's invocation must be non-blocking.
-  """
-  return cygrpc.call_credentials_metadata_plugin(
-      cygrpc.CredentialsMetadataPlugin(_WrappedPlugin(plugin), name))
+call_credentials_metadata_plugin = (
+    _plugin_wrapping.call_credentials_metadata_plugin)
 
 
 class CompletionQueue(_types.CompletionQueue):
diff --git a/src/python/grpcio/grpc/beta/_auth.py b/src/python/grpcio/grpc/_auth.py
similarity index 94%
rename from src/python/grpcio/grpc/beta/_auth.py
rename to src/python/grpcio/grpc/_auth.py
index 553d4b99918e9cb99db17a9005c82aa04459c15d..3ae00ca23a7f53abdffc4361c6fee6d0cbd1b1de 100644
--- a/src/python/grpcio/grpc/beta/_auth.py
+++ b/src/python/grpcio/grpc/_auth.py
@@ -31,7 +31,7 @@
 
 from concurrent import futures
 
-from grpc.beta import interfaces
+import grpc
 
 
 def _sign_request(callback, token, error):
@@ -39,7 +39,7 @@ def _sign_request(callback, token, error):
   callback(metadata, error)
 
 
-class GoogleCallCredentials(interfaces.GRPCAuthMetadataPlugin):
+class GoogleCallCredentials(grpc.AuthMetadataPlugin):
   """Metadata wrapper for GoogleCredentials from the oauth2client library."""
 
   def __init__(self, credentials):
@@ -63,7 +63,7 @@ class GoogleCallCredentials(interfaces.GRPCAuthMetadataPlugin):
     self._pool.shutdown(wait=False)
 
 
-class AccessTokenCallCredentials(interfaces.GRPCAuthMetadataPlugin):
+class AccessTokenCallCredentials(grpc.AuthMetadataPlugin):
   """Metadata wrapper for raw access token credentials."""
 
   def __init__(self, access_token):
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.c b/src/python/grpcio/grpc/_cython/imports.generated.c
index 5d09329680a5b2ab9f707bb8b447591e1e2a48d0..c80ee66c061f94b425f82756dffe8e262e48e41c 100644
--- a/src/python/grpcio/grpc/_cython/imports.generated.c
+++ b/src/python/grpcio/grpc/_cython/imports.generated.c
@@ -126,7 +126,6 @@ grpc_header_key_is_legal_type grpc_header_key_is_legal_import;
 grpc_header_nonbin_value_is_legal_type grpc_header_nonbin_value_is_legal_import;
 grpc_is_binary_header_type grpc_is_binary_header_import;
 grpc_call_error_to_string_type grpc_call_error_to_string_import;
-grpc_cronet_secure_channel_create_type grpc_cronet_secure_channel_create_import;
 grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
 grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
@@ -398,7 +397,6 @@ void pygrpc_load_imports(HMODULE library) {
   grpc_header_nonbin_value_is_legal_import = (grpc_header_nonbin_value_is_legal_type) GetProcAddress(library, "grpc_header_nonbin_value_is_legal");
   grpc_is_binary_header_import = (grpc_is_binary_header_type) GetProcAddress(library, "grpc_is_binary_header");
   grpc_call_error_to_string_import = (grpc_call_error_to_string_type) GetProcAddress(library, "grpc_call_error_to_string");
-  grpc_cronet_secure_channel_create_import = (grpc_cronet_secure_channel_create_type) GetProcAddress(library, "grpc_cronet_secure_channel_create");
   grpc_auth_property_iterator_next_import = (grpc_auth_property_iterator_next_type) GetProcAddress(library, "grpc_auth_property_iterator_next");
   grpc_auth_context_property_iterator_import = (grpc_auth_context_property_iterator_type) GetProcAddress(library, "grpc_auth_context_property_iterator");
   grpc_auth_context_peer_identity_import = (grpc_auth_context_peer_identity_type) GetProcAddress(library, "grpc_auth_context_peer_identity");
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.h b/src/python/grpcio/grpc/_cython/imports.generated.h
index cfadad0527f2cc2b17b2e430dc3f7ebe5a12b20d..7b8e98d9bf7c181f8e141cc2c71b2e36afde88dc 100644
--- a/src/python/grpcio/grpc/_cython/imports.generated.h
+++ b/src/python/grpcio/grpc/_cython/imports.generated.h
@@ -43,7 +43,6 @@
 #include <grpc/census.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
-#include <grpc/grpc_cronet.h>
 #include <grpc/grpc_security.h>
 #include <grpc/impl/codegen/alloc.h>
 #include <grpc/impl/codegen/byte_buffer.h>
@@ -329,9 +328,6 @@ extern grpc_is_binary_header_type grpc_is_binary_header_import;
 typedef const char *(*grpc_call_error_to_string_type)(grpc_call_error error);
 extern grpc_call_error_to_string_type grpc_call_error_to_string_import;
 #define grpc_call_error_to_string grpc_call_error_to_string_import
-typedef grpc_channel *(*grpc_cronet_secure_channel_create_type)(void *engine, const char *target, const grpc_channel_args *args, void *reserved);
-extern grpc_cronet_secure_channel_create_type grpc_cronet_secure_channel_create_import;
-#define grpc_cronet_secure_channel_create grpc_cronet_secure_channel_create_import
 typedef const grpc_auth_property *(*grpc_auth_property_iterator_next_type)(grpc_auth_property_iterator *it);
 extern grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 #define grpc_auth_property_iterator_next grpc_auth_property_iterator_next_import
diff --git a/src/python/grpcio/grpc/_server.py b/src/python/grpcio/grpc/_server.py
index c65070f1b3ac3bd26659cdaac7ee9f4336a938eb..aae9f48ae6c57dc1d964325e062d55ade386eb1d 100644
--- a/src/python/grpcio/grpc/_server.py
+++ b/src/python/grpcio/grpc/_server.py
@@ -65,12 +65,23 @@ def _serialized_request(request_event):
   return request_event.batch_operations[0].received_message.bytes()
 
 
-def _code(state):
+def _application_code(code):
+  cygrpc_code = _common.STATUS_CODE_TO_CYGRPC_STATUS_CODE.get(code)
+  return cygrpc.StatusCode.unknown if cygrpc_code is None else cygrpc_code
+
+
+def _completion_code(state):
   if state.code is None:
     return cygrpc.StatusCode.ok
   else:
-    code = _common.STATUS_CODE_TO_CYGRPC_STATUS_CODE.get(state.code)
-    return cygrpc.StatusCode.unknown if code is None else code
+    return _application_code(state.code)
+
+
+def _abortion_code(state, code):
+  if state.code is None:
+    return code
+  else:
+    return _application_code(state.code)
 
 
 def _details(state):
@@ -126,20 +137,22 @@ def _send_status_from_server(state, token):
 
 def _abort(state, call, code, details):
   if state.client is not _CANCELLED:
+    effective_code = _abortion_code(state, code)
+    effective_details = details if state.details is None else state.details
     if state.initial_metadata_allowed:
       operations = (
           cygrpc.operation_send_initial_metadata(
               _EMPTY_METADATA, _EMPTY_FLAGS),
           cygrpc.operation_send_status_from_server(
-              _common.metadata(state.trailing_metadata), code, details,
-              _EMPTY_FLAGS),
+              _common.metadata(state.trailing_metadata), effective_code,
+              effective_details, _EMPTY_FLAGS),
       )
       token = _SEND_INITIAL_METADATA_AND_SEND_STATUS_FROM_SERVER_TOKEN
     else:
       operations = (
           cygrpc.operation_send_status_from_server(
-              _common.metadata(state.trailing_metadata), code, details,
-              _EMPTY_FLAGS),
+              _common.metadata(state.trailing_metadata), effective_code,
+              effective_details, _EMPTY_FLAGS),
       )
       token = _SEND_STATUS_FROM_SERVER_TOKEN
     call.start_batch(
@@ -346,7 +359,7 @@ def _unary_request(rpc_event, state, request_deserializer):
 def _call_behavior(rpc_event, state, behavior, argument, request_deserializer):
   context = _Context(rpc_event, state, request_deserializer)
   try:
-    return behavior(argument, context)
+    return behavior(argument, context), True
   except Exception as e:  # pylint: disable=broad-except
     with state.condition:
       if e not in state.rpc_errors:
@@ -354,7 +367,7 @@ def _call_behavior(rpc_event, state, behavior, argument, request_deserializer):
         logging.exception(details)
         _abort(
             state, rpc_event.operation_call, cygrpc.StatusCode.unknown, details)
-    return None
+    return None, False
 
 
 def _take_response_from_response_iterator(rpc_event, state, response_iterator):
@@ -415,7 +428,7 @@ def _status(rpc_event, state, serialized_response):
   with state.condition:
     if state.client is not _CANCELLED:
       trailing_metadata = _common.metadata(state.trailing_metadata)
-      code = _code(state)
+      code = _completion_code(state)
       details = _details(state)
       operations = [
           cygrpc.operation_send_status_from_server(
@@ -440,9 +453,9 @@ def _unary_response_in_pool(
     response_serializer):
   argument = argument_thunk()
   if argument is not None:
-    response = _call_behavior(
+    response, proceed = _call_behavior(
         rpc_event, state, behavior, argument, request_deserializer)
-    if response is not None:
+    if proceed:
       serialized_response = _serialize_response(
           rpc_event, state, response, response_serializer)
       if serialized_response is not None:
@@ -455,9 +468,9 @@ def _stream_response_in_pool(
     response_serializer):
   argument = argument_thunk()
   if argument is not None:
-    response_iterator = _call_behavior(
+    response_iterator, proceed = _call_behavior(
         rpc_event, state, behavior, argument, request_deserializer)
-    if response_iterator is not None:
+    if proceed:
       while True:
         response, proceed = _take_response_from_response_iterator(
             rpc_event, state, response_iterator)
diff --git a/src/python/grpcio/grpc/beta/_client_adaptations.py b/src/python/grpcio/grpc/beta/_client_adaptations.py
new file mode 100644
index 0000000000000000000000000000000000000000..621fcf2174fbd26122b739f914cb7c27e1f1d4f4
--- /dev/null
+++ b/src/python/grpcio/grpc/beta/_client_adaptations.py
@@ -0,0 +1,566 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Translates gRPC's client-side API into gRPC's client-side Beta API."""
+
+import grpc
+from grpc._cython import cygrpc
+from grpc.beta import interfaces
+from grpc.framework.common import cardinality
+from grpc.framework.foundation import future
+from grpc.framework.interfaces.face import face
+
+_STATUS_CODE_TO_ABORTION_KIND_AND_ABORTION_ERROR_CLASS = {
+    grpc.StatusCode.CANCELLED: (
+        face.Abortion.Kind.CANCELLED, face.CancellationError),
+    grpc.StatusCode.UNKNOWN: (
+        face.Abortion.Kind.REMOTE_FAILURE, face.RemoteError),
+    grpc.StatusCode.DEADLINE_EXCEEDED: (
+        face.Abortion.Kind.EXPIRED, face.ExpirationError),
+    grpc.StatusCode.UNIMPLEMENTED: (
+        face.Abortion.Kind.LOCAL_FAILURE, face.LocalError),
+}
+
+
+def _fully_qualified_method(group, method):
+  return b'/{}/{}'.format(group, method)
+
+
+def _effective_metadata(metadata, metadata_transformer):
+  non_none_metadata = () if metadata is None else metadata
+  if metadata_transformer is None:
+    return non_none_metadata
+  else:
+    return metadata_transformer(non_none_metadata)
+
+
+def _credentials(grpc_call_options):
+  return None if grpc_call_options is None else grpc_call_options.credentials
+
+
+def _abortion(rpc_error_call):
+  code = rpc_error_call.code()
+  pair = _STATUS_CODE_TO_ABORTION_KIND_AND_ABORTION_ERROR_CLASS.get(code)
+  error_kind = face.Abortion.Kind.LOCAL_FAILURE if pair is None else pair[0]
+  return face.Abortion(
+      error_kind, rpc_error_call.initial_metadata(),
+      rpc_error_call.trailing_metadata(), code, rpc_error_code.details())
+
+
+def _abortion_error(rpc_error_call):
+  code = rpc_error_call.code()
+  pair = _STATUS_CODE_TO_ABORTION_KIND_AND_ABORTION_ERROR_CLASS.get(code)
+  exception_class = face.AbortionError if pair is None else pair[1]
+  return exception_class(
+      rpc_error_call.initial_metadata(), rpc_error_call.trailing_metadata(),
+      code, rpc_error_call.details())
+
+
+class _InvocationProtocolContext(interfaces.GRPCInvocationContext):
+
+  def disable_next_request_compression(self):
+    pass  # TODO(https://github.com/grpc/grpc/issues/4078): design, implement.
+
+
+class _Rendezvous(future.Future, face.Call):
+
+  def __init__(self, response_future, response_iterator, call):
+    self._future = response_future
+    self._iterator = response_iterator
+    self._call = call
+
+  def cancel(self):
+    return self._call.cancel()
+
+  def cancelled(self):
+    return self._future.cancelled()
+
+  def running(self):
+    return self._future.running()
+
+  def done(self):
+    return self._future.done()
+
+  def result(self, timeout=None):
+    try:
+      return self._future.result(timeout=timeout)
+    except grpc.RpcError as rpc_error_call:
+      raise _abortion_error(rpc_error_call)
+    except grpc.FutureTimeoutError:
+      raise future.TimeoutError()
+    except grpc.FutureCancelledError:
+      raise future.CancelledError()
+
+  def exception(self, timeout=None):
+    try:
+      rpc_error_call = self._future.exception(timeout=timeout)
+      return _abortion_error(rpc_error_call)
+    except grpc.FutureTimeoutError:
+      raise future.TimeoutError()
+    except grpc.FutureCancelledError:
+      raise future.CancelledError()
+
+  def traceback(self, timeout=None):
+    try:
+      return self._future.traceback(timeout=timeout)
+    except grpc.FutureTimeoutError:
+      raise future.TimeoutError()
+    except grpc.FutureCancelledError:
+      raise future.CancelledError()
+
+  def add_done_callback(self, fn):
+    self._future.add_done_callback(lambda ignored_callback: fn(self))
+
+  def __iter__(self):
+    return self
+
+  def _next(self):
+    try:
+      return next(self._iterator)
+    except grpc.RpcError as rpc_error_call:
+      raise _abortion_error(rpc_error_call)
+
+  def __next__(self):
+    return self._next()
+
+  def next(self):
+    return self._next()
+
+  def is_active(self):
+    return self._call.is_active()
+
+  def time_remaining(self):
+    return self._call.time_remaining()
+
+  def add_abortion_callback(self, abortion_callback):
+    registered = self._call.add_callback(
+        lambda: abortion_callback(_abortion(self._call)))
+    return None if registered else _abortion(self._call)
+
+  def protocol_context(self):
+    return _InvocationProtocolContext()
+
+  def initial_metadata(self):
+    return self._call.initial_metadata()
+
+  def terminal_metadata(self):
+    return self._call.terminal_metadata()
+
+  def code(self):
+    return self._call.code()
+
+  def details(self):
+    return self._call.details()
+
+
+def _blocking_unary_unary(
+    channel, group, method, timeout, with_call, protocol_options, metadata,
+    metadata_transformer, request, request_serializer, response_deserializer):
+  try:
+    multi_callable = channel.unary_unary(
+        _fully_qualified_method(group, method),
+        request_serializer=request_serializer,
+        response_deserializer=response_deserializer)
+    effective_metadata = _effective_metadata(metadata, metadata_transformer)
+    if with_call:
+      response, call = multi_callable(
+          request, timeout=timeout, metadata=effective_metadata,
+          credentials=_credentials(protocol_options), with_call=True)
+      return response, _Rendezvous(None, None, call)
+    else:
+      return multi_callable(
+          request, timeout=timeout, metadata=effective_metadata,
+          credentials=_credentials(protocol_options))
+  except grpc.RpcError as rpc_error_call:
+    raise _abortion_error(rpc_error_call)
+
+
+def _future_unary_unary(
+    channel, group, method, timeout, protocol_options, metadata,
+    metadata_transformer, request, request_serializer, response_deserializer):
+  multi_callable = channel.unary_unary(
+      _fully_qualified_method(group, method),
+      request_serializer=request_serializer,
+      response_deserializer=response_deserializer)
+  effective_metadata = _effective_metadata(metadata, metadata_transformer)
+  response_future = multi_callable.future(
+      request, timeout=timeout, metadata=effective_metadata,
+      credentials=_credentials(protocol_options))
+  return _Rendezvous(response_future, None, response_future)
+
+
+def _unary_stream(
+    channel, group, method, timeout, protocol_options, metadata,
+    metadata_transformer, request, request_serializer, response_deserializer):
+  multi_callable = channel.unary_stream(
+      _fully_qualified_method(group, method),
+      request_serializer=request_serializer,
+      response_deserializer=response_deserializer)
+  effective_metadata = _effective_metadata(metadata, metadata_transformer)
+  response_iterator = multi_callable(
+      request, timeout=timeout, metadata=effective_metadata,
+      credentials=_credentials(protocol_options))
+  return _Rendezvous(None, response_iterator, response_iterator)
+
+
+def _blocking_stream_unary(
+    channel, group, method, timeout, with_call, protocol_options, metadata,
+    metadata_transformer, request_iterator, request_serializer,
+    response_deserializer):
+  try:
+    multi_callable = channel.stream_unary(
+        _fully_qualified_method(group, method),
+        request_serializer=request_serializer,
+        response_deserializer=response_deserializer)
+    effective_metadata = _effective_metadata(metadata, metadata_transformer)
+    if with_call:
+      response, call = multi_callable(
+          request_iterator, timeout=timeout, metadata=effective_metadata,
+          credentials=_credentials(protocol_options), with_call=True)
+      return response, _Rendezvous(None, None, call)
+    else:
+      return multi_callable(
+          request_iterator, timeout=timeout, metadata=effective_metadata,
+          credentials=_credentials(protocol_options))
+  except grpc.RpcError as rpc_error_call:
+    raise _abortion_error(rpc_error_call)
+
+
+def _future_stream_unary(
+    channel, group, method, timeout, protocol_options, metadata,
+    metadata_transformer, request_iterator, request_serializer,
+    response_deserializer):
+  multi_callable = channel.stream_unary(
+      _fully_qualified_method(group, method),
+      request_serializer=request_serializer,
+      response_deserializer=response_deserializer)
+  effective_metadata = _effective_metadata(metadata, metadata_transformer)
+  response_future = multi_callable.future(
+      request_iterator, timeout=timeout, metadata=effective_metadata,
+      credentials=_credentials(protocol_options))
+  return _Rendezvous(response_future, None, response_future)
+
+
+def _stream_stream(
+    channel, group, method, timeout, protocol_options, metadata,
+    metadata_transformer, request_iterator, request_serializer,
+    response_deserializer):
+  multi_callable = channel.stream_stream(
+      _fully_qualified_method(group, method),
+      request_serializer=request_serializer,
+      response_deserializer=response_deserializer)
+  effective_metadata = _effective_metadata(metadata, metadata_transformer)
+  response_iterator = multi_callable(
+      request_iterator, timeout=timeout, metadata=effective_metadata,
+      credentials=_credentials(protocol_options))
+  return _Rendezvous(None, response_iterator, response_iterator)
+
+
+class _UnaryUnaryMultiCallable(face.UnaryUnaryMultiCallable):
+
+  def __init__(
+      self, channel, group, method, metadata_transformer, request_serializer,
+      response_deserializer):
+    self._channel = channel
+    self._group = group
+    self._method = method
+    self._metadata_transformer = metadata_transformer
+    self._request_serializer = request_serializer
+    self._response_deserializer = response_deserializer
+
+  def __call__(
+      self, request, timeout, metadata=None, with_call=False,
+      protocol_options=None):
+    return _blocking_unary_unary(
+        self._channel, self._group, self._method, timeout, with_call,
+        protocol_options, metadata, self._metadata_transformer, request,
+        self._request_serializer, self._response_deserializer)
+
+  def future(self, request, timeout, metadata=None, protocol_options=None):
+    return _future_unary_unary(
+        self._channel, self._group, self._method, timeout, protocol_options,
+        metadata, self._metadata_transformer, request, self._request_serializer,
+        self._response_deserializer)
+
+  def event(
+      self, request, receiver, abortion_callback, timeout,
+      metadata=None, protocol_options=None):
+    raise NotImplementedError()
+
+
+class _UnaryStreamMultiCallable(face.UnaryStreamMultiCallable):
+
+  def __init__(
+      self, channel, group, method, metadata_transformer, request_serializer,
+      response_deserializer):
+    self._channel = channel
+    self._group = group
+    self._method = method
+    self._metadata_transformer = metadata_transformer
+    self._request_serializer = request_serializer
+    self._response_deserializer = response_deserializer
+
+  def __call__(self, request, timeout, metadata=None, protocol_options=None):
+    return _unary_stream(
+        self._channel, self._group, self._method, timeout, protocol_options,
+        metadata, self._metadata_transformer, request, self._request_serializer,
+        self._response_deserializer)
+
+  def event(
+      self, request, receiver, abortion_callback, timeout,
+      metadata=None, protocol_options=None):
+    raise NotImplementedError()
+
+
+class _StreamUnaryMultiCallable(face.StreamUnaryMultiCallable):
+
+  def __init__(
+      self, channel, group, method, metadata_transformer, request_serializer,
+      response_deserializer):
+    self._channel = channel
+    self._group = group
+    self._method = method
+    self._metadata_transformer = metadata_transformer
+    self._request_serializer = request_serializer
+    self._response_deserializer = response_deserializer
+
+  def __call__(
+      self, request_iterator, timeout, metadata=None, with_call=False,
+      protocol_options=None):
+    return _blocking_stream_unary(
+        self._channel, self._group, self._method, timeout, with_call,
+        protocol_options, metadata, self._metadata_transformer,
+        request_iterator, self._request_serializer, self._response_deserializer)
+
+  def future(
+      self, request_iterator, timeout, metadata=None, protocol_options=None):
+    return _future_stream_unary(
+        self._channel, self._group, self._method, timeout, protocol_options,
+        metadata, self._metadata_transformer, request_iterator,
+        self._request_serializer, self._response_deserializer)
+
+  def event(
+      self, receiver, abortion_callback, timeout, metadata=None,
+      protocol_options=None):
+    raise NotImplementedError()
+
+
+class _StreamStreamMultiCallable(face.StreamStreamMultiCallable):
+
+  def __init__(
+      self, channel, group, method, metadata_transformer, request_serializer,
+      response_deserializer):
+    self._channel = channel
+    self._group = group
+    self._method = method
+    self._metadata_transformer = metadata_transformer
+    self._request_serializer = request_serializer
+    self._response_deserializer = response_deserializer
+
+  def __call__(
+      self, request_iterator, timeout, metadata=None, protocol_options=None):
+    return _stream_stream(
+        self._channel, self._group, self._method, timeout, protocol_options,
+        metadata, self._metadata_transformer, request_iterator,
+        self._request_serializer, self._response_deserializer)
+
+  def event(
+      self, receiver, abortion_callback, timeout, metadata=None,
+      protocol_options=None):
+    raise NotImplementedError()
+
+
+class _GenericStub(face.GenericStub):
+
+  def __init__(
+      self, channel, metadata_transformer, request_serializers,
+      response_deserializers):
+    self._channel = channel
+    self._metadata_transformer = metadata_transformer
+    self._request_serializers = request_serializers or {}
+    self._response_deserializers = response_deserializers or {}
+
+  def blocking_unary_unary(
+      self, group, method, request, timeout, metadata=None,
+      with_call=None, protocol_options=None):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _blocking_unary_unary(
+        self._channel, group, method, timeout, with_call, protocol_options,
+        metadata, self._metadata_transformer, request, request_serializer,
+        response_deserializer)
+
+  def future_unary_unary(
+      self, group, method, request, timeout, metadata=None,
+      protocol_options=None):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _future_unary_unary(
+        self._channel, group, method, timeout, protocol_options, metadata,
+        self._metadata_transformer, request, request_serializer,
+        response_deserializer)
+
+  def inline_unary_stream(
+      self, group, method, request, timeout, metadata=None,
+      protocol_options=None):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _unary_stream(
+        self._channel, group, method, timeout, protocol_options, metadata,
+        self._metadata_transformer, request, request_serializer,
+        response_deserializer)
+
+  def blocking_stream_unary(
+      self, group, method, request_iterator, timeout, metadata=None,
+      with_call=None, protocol_options=None):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _blocking_stream_unary(
+        self._channel, group, method, timeout, with_call, protocol_options,
+        metadata, self._metadata_transformer, request_iterator,
+        request_serializer, response_deserializer)
+
+  def future_stream_unary(
+      self, group, method, request_iterator, timeout, metadata=None,
+      protocol_options=None):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _future_stream_unary(
+        self._channel, group, method, timeout, protocol_options, metadata,
+        self._metadata_transformer, request_iterator, request_serializer,
+        response_deserializer)
+
+  def inline_stream_stream(
+      self, group, method, request_iterator, timeout, metadata=None,
+      protocol_options=None):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _stream_stream(
+        self._channel, group, method, timeout, protocol_options, metadata,
+        self._metadata_transformer, request_iterator, request_serializer,
+        response_deserializer)
+
+  def event_unary_unary(
+      self, group, method, request, receiver, abortion_callback, timeout,
+      metadata=None, protocol_options=None):
+    raise NotImplementedError()
+
+  def event_unary_stream(
+      self, group, method, request, receiver, abortion_callback, timeout,
+      metadata=None, protocol_options=None):
+    raise NotImplementedError()
+
+  def event_stream_unary(
+      self, group, method, receiver, abortion_callback, timeout,
+      metadata=None, protocol_options=None):
+    raise NotImplementedError()
+
+  def event_stream_stream(
+      self, group, method, receiver, abortion_callback, timeout,
+      metadata=None, protocol_options=None):
+    raise NotImplementedError()
+
+  def unary_unary(self, group, method):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _UnaryUnaryMultiCallable(
+        self._channel, group, method, self._metadata_transformer,
+        request_serializer, response_deserializer)
+
+  def unary_stream(self, group, method):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _UnaryStreamMultiCallable(
+        self._channel, group, method, self._metadata_transformer,
+        request_serializer, response_deserializer)
+
+  def stream_unary(self, group, method):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _StreamUnaryMultiCallable(
+        self._channel, group, method, self._metadata_transformer,
+        request_serializer, response_deserializer)
+
+  def stream_stream(self, group, method):
+    request_serializer = self._request_serializers.get((group, method,))
+    response_deserializer = self._response_deserializers.get((group, method,))
+    return _StreamStreamMultiCallable(
+        self._channel, group, method, self._metadata_transformer,
+        request_serializer, response_deserializer)
+
+  def __enter__(self):
+    return self
+
+  def __exit__(self, exc_type, exc_val, exc_tb):
+    return False
+
+
+class _DynamicStub(face.DynamicStub):
+
+  def __init__(self, generic_stub, group, cardinalities):
+    self._generic_stub = generic_stub
+    self._group = group
+    self._cardinalities = cardinalities
+
+  def __getattr__(self, attr):
+    method_cardinality = self._cardinalities.get(attr)
+    if method_cardinality is cardinality.Cardinality.UNARY_UNARY:
+      return self._generic_stub.unary_unary(self._group, attr)
+    elif method_cardinality is cardinality.Cardinality.UNARY_STREAM:
+      return self._generic_stub.unary_stream(self._group, attr)
+    elif method_cardinality is cardinality.Cardinality.STREAM_UNARY:
+      return self._generic_stub.stream_unary(self._group, attr)
+    elif method_cardinality is cardinality.Cardinality.STREAM_STREAM:
+      return self._generic_stub.stream_stream(self._group, attr)
+    else:
+      raise AttributeError('_DynamicStub object has no attribute "%s"!' % attr)
+
+  def __enter__(self):
+    return self
+
+  def __exit__(self, exc_type, exc_val, exc_tb):
+    return False
+
+
+def generic_stub(
+    channel, host, metadata_transformer, request_serializers,
+    response_deserializers):
+  return _GenericStub(
+      channel, metadata_transformer, request_serializers,
+      response_deserializers)
+
+
+def dynamic_stub(
+    channel, service, cardinalities, host, metadata_transformer,
+    request_serializers, response_deserializers):
+  return _DynamicStub(
+      _GenericStub(
+          channel, metadata_transformer, request_serializers,
+          response_deserializers),
+      service, cardinalities)
diff --git a/src/python/grpcio/grpc/beta/_server_adaptations.py b/src/python/grpcio/grpc/beta/_server_adaptations.py
new file mode 100644
index 0000000000000000000000000000000000000000..52eadf23158b931b3ff8dad0415a47bb3906fa71
--- /dev/null
+++ b/src/python/grpcio/grpc/beta/_server_adaptations.py
@@ -0,0 +1,359 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Translates gRPC's server-side API into gRPC's server-side Beta API."""
+
+import collections
+import threading
+
+import grpc
+from grpc.beta import interfaces
+from grpc.framework.common import cardinality
+from grpc.framework.common import style
+from grpc.framework.foundation import abandonment
+from grpc.framework.foundation import logging_pool
+from grpc.framework.foundation import stream
+from grpc.framework.interfaces.face import face
+
+_DEFAULT_POOL_SIZE = 8
+
+
+class _ServerProtocolContext(interfaces.GRPCServicerContext):
+
+  def __init__(self, servicer_context):
+    self._servicer_context = servicer_context
+
+  def peer(self):
+    return self._servicer_context.peer()
+
+  def disable_next_response_compression(self):
+    pass  # TODO(https://github.com/grpc/grpc/issues/4078): design, implement.
+
+
+class _FaceServicerContext(face.ServicerContext):
+
+  def __init__(self, servicer_context):
+    self._servicer_context = servicer_context
+
+  def is_active(self):
+    return self._servicer_context.is_active()
+
+  def time_remaining(self):
+    return self._servicer_context.time_remaining()
+
+  def add_abortion_callback(self, abortion_callback):
+    raise NotImplementedError(
+        'add_abortion_callback no longer supported server-side!')
+
+  def cancel(self):
+    self._servicer_context.cancel()
+
+  def protocol_context(self):
+    return _ServerProtocolContext(self._servicer_context)
+
+  def invocation_metadata(self):
+    return self._servicer_context.invocation_metadata()
+
+  def initial_metadata(self, initial_metadata):
+    self._servicer_context.send_initial_metadata(initial_metadata)
+
+  def terminal_metadata(self, terminal_metadata):
+    self._servicer_context.set_terminal_metadata(terminal_metadata)
+
+  def code(self, code):
+    self._servicer_context.set_code(code)
+
+  def details(self, details):
+    self._servicer_context.set_details(details)
+
+
+def _adapt_unary_request_inline(unary_request_inline):
+  def adaptation(request, servicer_context):
+    return unary_request_inline(request, _FaceServicerContext(servicer_context))
+  return adaptation
+
+
+def _adapt_stream_request_inline(stream_request_inline):
+  def adaptation(request_iterator, servicer_context):
+    return stream_request_inline(
+        request_iterator, _FaceServicerContext(servicer_context))
+  return adaptation
+
+
+class _Callback(stream.Consumer):
+
+  def __init__(self):
+    self._condition = threading.Condition()
+    self._values = []
+    self._terminated = False
+    self._cancelled = False
+
+  def consume(self, value):
+    with self._condition:
+      self._values.append(value)
+      self._condition.notify_all()
+
+  def terminate(self):
+    with self._condition:
+      self._terminated = True
+      self._condition.notify_all()
+
+  def consume_and_terminate(self, value):
+    with self._condition:
+      self._values.append(value)
+      self._terminated = True
+      self._condition.notify_all()
+
+  def cancel(self):
+    with self._condition:
+      self._cancelled = True
+      self._condition.notify_all()
+
+  def draw_one_value(self):
+    with self._condition:
+      while True:
+        if self._cancelled:
+          raise abandonment.Abandoned()
+        elif self._values:
+          return self._values.pop(0)
+        elif self._terminated:
+          return None
+        else:
+          self._condition.wait()
+
+  def draw_all_values(self):
+    with self._condition:
+      while True:
+        if self._cancelled:
+          raise abandonment.Abandoned()
+        elif self._terminated:
+          all_values = tuple(self._values)
+          self._values = None
+          return all_values
+        else:
+          self._condition.wait()
+
+
+def _pipe_requests(request_iterator, request_consumer, servicer_context):
+  for request in request_iterator:
+    if not servicer_context.is_active():
+      return
+    request_consumer.consume(request)
+    if not servicer_context.is_active():
+      return
+  request_consumer.terminate()
+
+
+def _adapt_unary_unary_event(unary_unary_event):
+  def adaptation(request, servicer_context):
+    callback = _Callback()
+    if not servicer_context.add_callback(callback.cancel):
+      raise abandonment.Abandoned()
+    unary_unary_event(
+        request, callback.consume_and_terminate,
+        _FaceServicerContext(servicer_context))
+    return callback.draw_all_values()[0]
+  return adaptation
+
+
+def _adapt_unary_stream_event(unary_stream_event):
+  def adaptation(request, servicer_context):
+    callback = _Callback()
+    if not servicer_context.add_callback(callback.cancel):
+      raise abandonment.Abandoned()
+    unary_stream_event(
+        request, callback, _FaceServicerContext(servicer_context))
+    while True:
+      response = callback.draw_one_value()
+      if response is None:
+        return
+      else:
+        yield response
+  return adaptation
+
+
+def _adapt_stream_unary_event(stream_unary_event):
+  def adaptation(request_iterator, servicer_context):
+    callback = _Callback()
+    if not servicer_context.add_callback(callback.cancel):
+      raise abandonment.Abandoned()
+    request_consumer = stream_unary_event(
+        callback.consume_and_terminate, _FaceServicerContext(servicer_context))
+    request_pipe_thread = threading.Thread(
+        target=_pipe_requests,
+        args=(request_iterator, request_consumer, servicer_context,))
+    request_pipe_thread.start()
+    return callback.draw_all_values()[0]
+  return adaptation
+
+
+def _adapt_stream_stream_event(stream_stream_event):
+  def adaptation(request_iterator, servicer_context):
+    callback = _Callback()
+    if not servicer_context.add_callback(callback.cancel):
+      raise abandonment.Abandoned()
+    request_consumer = stream_stream_event(
+        callback, _FaceServicerContext(servicer_context))
+    request_pipe_thread = threading.Thread(
+        target=_pipe_requests,
+        args=(request_iterator, request_consumer, servicer_context,))
+    request_pipe_thread.start()
+    while True:
+      response = callback.draw_one_value()
+      if response is None:
+        return
+      else:
+        yield response
+  return adaptation
+
+
+class _SimpleMethodHandler(
+    collections.namedtuple(
+        '_MethodHandler',
+        ('request_streaming', 'response_streaming', 'request_deserializer',
+         'response_serializer', 'unary_unary', 'unary_stream', 'stream_unary',
+         'stream_stream',)),
+    grpc.RpcMethodHandler):
+  pass
+
+
+def _simple_method_handler(
+    implementation, request_deserializer, response_serializer):
+  if implementation.style is style.Service.INLINE:
+    if implementation.cardinality is cardinality.Cardinality.UNARY_UNARY:
+      return _SimpleMethodHandler(
+          False, False, request_deserializer, response_serializer,
+          _adapt_unary_request_inline(implementation.unary_unary_inline), None,
+          None, None)
+    elif implementation.cardinality is cardinality.Cardinality.UNARY_STREAM:
+      return _SimpleMethodHandler(
+          False, True, request_deserializer, response_serializer, None,
+          _adapt_unary_request_inline(implementation.unary_stream_inline), None,
+          None)
+    elif implementation.cardinality is cardinality.Cardinality.STREAM_UNARY:
+      return _SimpleMethodHandler(
+          True, False, request_deserializer, response_serializer, None, None,
+          _adapt_stream_request_inline(implementation.stream_unary_inline),
+          None)
+    elif implementation.cardinality is cardinality.Cardinality.STREAM_STREAM:
+      return _SimpleMethodHandler(
+          True, True, request_deserializer, response_serializer, None, None,
+          None,
+          _adapt_stream_request_inline(implementation.stream_stream_inline))
+  elif implementation.style is style.Service.EVENT:
+    if implementation.cardinality is cardinality.Cardinality.UNARY_UNARY:
+      return _SimpleMethodHandler(
+          False, False, request_deserializer, response_serializer,
+          _adapt_unary_unary_event(implementation.unary_unary_event), None,
+          None, None)
+    elif implementation.cardinality is cardinality.Cardinality.UNARY_STREAM:
+      return _SimpleMethodHandler(
+          False, True, request_deserializer, response_serializer, None,
+          _adapt_unary_stream_event(implementation.unary_stream_event), None,
+          None)
+    elif implementation.cardinality is cardinality.Cardinality.STREAM_UNARY:
+      return _SimpleMethodHandler(
+          True, False, request_deserializer, response_serializer, None, None,
+          _adapt_stream_unary_event(implementation.stream_unary_event), None)
+    elif implementation.cardinality is cardinality.Cardinality.STREAM_STREAM:
+      return _SimpleMethodHandler(
+          True, True, request_deserializer, response_serializer, None, None,
+          None, _adapt_stream_stream_event(implementation.stream_stream_event))
+
+
+class _GenericRpcHandler(grpc.GenericRpcHandler):
+
+  def __init__(
+      self, method_implementations, multi_method_implementation,
+      request_deserializers, response_serializers):
+    self._method_implementations = method_implementations
+    self._multi_method_implementation = multi_method_implementation
+    self._request_deserializers = request_deserializers or {}
+    self._response_serializers = response_serializers or {}
+
+  def service(self, handler_call_details):
+    try:
+      group_name, method_name = handler_call_details.method.split(b'/')[1:3]
+    except ValueError:
+      return None
+    else:
+      method_implementation = self._method_implementations.get(
+          (group_name, method_name,))
+      if method_implementation is not None:
+        return _simple_method_handler(
+            method_implementation,
+            self._request_deserializers.get((group_name, method_name,)),
+            self._response_serializers.get((group_name, method_name,)))
+      elif self._multi_method_implementation is None:
+        return None
+      else:
+        try:
+          return None  #TODO(nathaniel): call the multimethod.
+        except face.NoSuchMethodError:
+          return None
+
+
+class _Server(interfaces.Server):
+
+  def __init__(self, server):
+    self._server = server
+
+  def add_insecure_port(self, address):
+    return self._server.add_insecure_port(address)
+
+  def add_secure_port(self, address, server_credentials):
+    return self._server.add_secure_port(address, server_credentials)
+
+  def start(self):
+    self._server.start()
+
+  def stop(self, grace):
+    return self._server.stop(grace)
+
+  def __enter__(self):
+    self._server.start()
+    return self
+
+  def __exit__(self, exc_type, exc_val, exc_tb):
+    self._server.stop(None)
+    return False
+
+
+def server(
+    service_implementations, multi_method_implementation, request_deserializers,
+    response_serializers, thread_pool, thread_pool_size):
+  generic_rpc_handler = _GenericRpcHandler(
+      service_implementations, multi_method_implementation,
+      request_deserializers, response_serializers)
+  if thread_pool is None:
+    effective_thread_pool = logging_pool.pool(
+        _DEFAULT_POOL_SIZE if thread_pool_size is None else thread_pool_size)
+  else:
+    effective_thread_pool = thread_pool
+  return _Server(grpc.server((generic_rpc_handler,), effective_thread_pool))
diff --git a/src/python/grpcio/grpc/beta/implementations.py b/src/python/grpcio/grpc/beta/implementations.py
index d8c32dd2f53a98be66b55a290905dd06ed689552..4ae6e7d6751ead630a3d79cbb1bdcfc9afab8f60 100644
--- a/src/python/grpcio/grpc/beta/implementations.py
+++ b/src/python/grpcio/grpc/beta/implementations.py
@@ -35,83 +35,20 @@ import enum
 import threading  # pylint: disable=unused-import
 
 # cardinality and face are referenced from specification in this module.
-from grpc._adapter import _intermediary_low
-from grpc._adapter import _low
+import grpc
+from grpc import _auth
 from grpc._adapter import _types
-from grpc.beta import _auth
-from grpc.beta import _connectivity_channel
-from grpc.beta import _server
-from grpc.beta import _stub
+from grpc.beta import _client_adaptations
+from grpc.beta import _server_adaptations
 from grpc.beta import interfaces
 from grpc.framework.common import cardinality  # pylint: disable=unused-import
 from grpc.framework.interfaces.face import face  # pylint: disable=unused-import
 
-_CHANNEL_SUBSCRIPTION_CALLBACK_ERROR_LOG_MESSAGE = (
-    'Exception calling channel subscription callback!')
 
-
-class ChannelCredentials(object):
-  """A value encapsulating the data required to create a secure Channel.
-
-  This class and its instances have no supported interface - it exists to define
-  the type of its instances and its instances exist to be passed to other
-  functions.
-  """
-
-  def __init__(self, low_credentials):
-    self._low_credentials = low_credentials
-
-
-def ssl_channel_credentials(root_certificates=None, private_key=None,
-                            certificate_chain=None):
-  """Creates a ChannelCredentials for use with an SSL-enabled Channel.
-
-  Args:
-    root_certificates: The PEM-encoded root certificates or unset to ask for
-      them to be retrieved from a default location.
-    private_key: The PEM-encoded private key to use or unset if no private key
-      should be used.
-    certificate_chain: The PEM-encoded certificate chain to use or unset if no
-      certificate chain should be used.
-
-  Returns:
-    A ChannelCredentials for use with an SSL-enabled Channel.
-  """
-  return ChannelCredentials(_low.channel_credentials_ssl(
-      root_certificates, private_key, certificate_chain))
-
-
-class CallCredentials(object):
-  """A value encapsulating data asserting an identity over an *established*
-  channel. May be composed with ChannelCredentials to always assert identity for
-  every call over that channel.
-
-  This class and its instances have no supported interface - it exists to define
-  the type of its instances and its instances exist to be passed to other
-  functions.
-  """
-
-  def __init__(self, low_credentials):
-    self._low_credentials = low_credentials
-
-
-def metadata_call_credentials(metadata_plugin, name=None):
-  """Construct CallCredentials from an interfaces.GRPCAuthMetadataPlugin.
-
-  Args:
-    metadata_plugin: An interfaces.GRPCAuthMetadataPlugin to use in constructing
-      the CallCredentials object.
-
-  Returns:
-    A CallCredentials object for use in a GRPCCallOptions object.
-  """
-  if name is None:
-    try:
-      name = metadata_plugin.__name__
-    except AttributeError:
-      name = metadata_plugin.__class__.__name__
-  return CallCredentials(
-      _low.call_credentials_metadata_plugin(metadata_plugin, name))
+ChannelCredentials = grpc.ChannelCredentials
+ssl_channel_credentials = grpc.ssl_channel_credentials
+CallCredentials = grpc.CallCredentials
+metadata_call_credentials = grpc.metadata_call_credentials
 
 
 def google_call_credentials(credentials):
@@ -125,53 +62,9 @@ def google_call_credentials(credentials):
   """
   return metadata_call_credentials(_auth.GoogleCallCredentials(credentials))
 
-
-def access_token_call_credentials(access_token):
-  """Construct CallCredentials from an access token.
-
-  Args:
-    access_token: A string to place directly in the http request
-      authorization header, ie "Authorization: Bearer <access_token>".
-
-  Returns:
-    A CallCredentials object for use in a GRPCCallOptions object.
-  """
-  return metadata_call_credentials(
-      _auth.AccessTokenCallCredentials(access_token))
-
-
-def composite_call_credentials(call_credentials, additional_call_credentials):
-  """Compose two CallCredentials to make a new one.
-
-  Args:
-    call_credentials: A CallCredentials object.
-    additional_call_credentials: Another CallCredentials object to compose on
-      top of call_credentials.
-
-  Returns:
-    A CallCredentials object for use in a GRPCCallOptions object.
-  """
-  return CallCredentials(
-      _low.call_credentials_composite(
-          call_credentials._low_credentials,
-          additional_call_credentials._low_credentials))
-
-def composite_channel_credentials(channel_credentials,
-                                 additional_call_credentials):
-  """Compose ChannelCredentials on top of client credentials to make a new one.
-
-  Args:
-    channel_credentials: A ChannelCredentials object.
-    additional_call_credentials: A CallCredentials object to compose on
-      top of channel_credentials.
-
-  Returns:
-    A ChannelCredentials object for use in a GRPCCallOptions object.
-  """
-  return ChannelCredentials(
-      _low.channel_credentials_composite(
-          channel_credentials._low_credentials,
-          additional_call_credentials._low_credentials))
+access_token_call_credentials = grpc.access_token_call_credentials
+composite_call_credentials = grpc.composite_call_credentials
+composite_channel_credentials = grpc.composite_channel_credentials
 
 
 class Channel(object):
@@ -182,11 +75,8 @@ class Channel(object):
   unsupported.
   """
 
-  def __init__(self, low_channel, intermediary_low_channel):
-    self._low_channel = low_channel
-    self._intermediary_low_channel = intermediary_low_channel
-    self._connectivity_channel = _connectivity_channel.ConnectivityChannel(
-        low_channel)
+  def __init__(self, channel):
+    self._channel = channel
 
   def subscribe(self, callback, try_to_connect=None):
     """Subscribes to this Channel's connectivity.
@@ -201,7 +91,7 @@ class Channel(object):
         attempt to connect if it is not already connected and ready to conduct
         RPCs.
     """
-    self._connectivity_channel.subscribe(callback, try_to_connect)
+    self._channel.subscribe(callback, try_to_connect=try_to_connect)
 
   def unsubscribe(self, callback):
     """Unsubscribes a callback from this Channel's connectivity.
@@ -210,7 +100,7 @@ class Channel(object):
       callback: A callable previously registered with this Channel from having
         been passed to its "subscribe" method.
     """
-    self._connectivity_channel.unsubscribe(callback)
+    self._channel.unsubscribe(callback)
 
 
 def insecure_channel(host, port):
@@ -224,9 +114,9 @@ def insecure_channel(host, port):
   Returns:
     A Channel to the remote host through which RPCs may be conducted.
   """
-  intermediary_low_channel = _intermediary_low.Channel(
-      '%s:%d' % (host, port) if port else host, None)
-  return Channel(intermediary_low_channel._internal, intermediary_low_channel)  # pylint: disable=protected-access
+  channel = grpc.insecure_channel(
+      host if port is None else '%s:%d' % (host, port))
+  return Channel(channel)
 
 
 def secure_channel(host, port, channel_credentials):
@@ -241,10 +131,9 @@ def secure_channel(host, port, channel_credentials):
   Returns:
     A secure Channel to the remote host through which RPCs may be conducted.
   """
-  intermediary_low_channel = _intermediary_low.Channel(
-      '%s:%d' % (host, port) if port else host,
-      channel_credentials._low_credentials)
-  return Channel(intermediary_low_channel._internal, intermediary_low_channel)  # pylint: disable=protected-access
+  channel = grpc.secure_channel(
+      host if port is None else '%s:%d' % (host, port), channel_credentials)
+  return Channel(channel)
 
 
 class StubOptions(object):
@@ -308,12 +197,11 @@ def generic_stub(channel, options=None):
     A face.GenericStub on which RPCs can be made.
   """
   effective_options = _EMPTY_STUB_OPTIONS if options is None else options
-  return _stub.generic_stub(
-      channel._intermediary_low_channel, effective_options.host,  # pylint: disable=protected-access
-      effective_options.metadata_transformer,
+  return _client_adaptations.generic_stub(
+      channel._channel,  # pylint: disable=protected-access
+      effective_options.host, effective_options.metadata_transformer,
       effective_options.request_serializers,
-      effective_options.response_deserializers, effective_options.thread_pool,
-      effective_options.thread_pool_size)
+      effective_options.response_deserializers)
 
 
 def dynamic_stub(channel, service, cardinalities, options=None):
@@ -331,55 +219,16 @@ def dynamic_stub(channel, service, cardinalities, options=None):
     A face.DynamicStub with which RPCs can be invoked.
   """
   effective_options = StubOptions() if options is None else options
-  return _stub.dynamic_stub(
-      channel._intermediary_low_channel, effective_options.host, service,  # pylint: disable=protected-access
-      cardinalities, effective_options.metadata_transformer,
+  return _client_adaptations.dynamic_stub(
+      channel._channel,  # pylint: disable=protected-access
+      service, cardinalities, effective_options.host,
+      effective_options.metadata_transformer,
       effective_options.request_serializers,
-      effective_options.response_deserializers, effective_options.thread_pool,
-      effective_options.thread_pool_size)
-
-
-class ServerCredentials(object):
-  """A value encapsulating the data required to open a secure port on a Server.
+      effective_options.response_deserializers)
 
-  This class and its instances have no supported interface - it exists to define
-  the type of its instances and its instances exist to be passed to other
-  functions.
-  """
 
-  def __init__(self, low_credentials):
-    self._low_credentials = low_credentials
-
-
-def ssl_server_credentials(
-    private_key_certificate_chain_pairs, root_certificates=None,
-    require_client_auth=False):
-  """Creates a ServerCredentials for use with an SSL-enabled Server.
-
-  Args:
-    private_key_certificate_chain_pairs: A nonempty sequence each element of
-      which is a pair the first element of which is a PEM-encoded private key
-      and the second element of which is the corresponding PEM-encoded
-      certificate chain.
-    root_certificates: PEM-encoded client root certificates to be used for
-      verifying authenticated clients. If omitted, require_client_auth must also
-      be omitted or be False.
-    require_client_auth: A boolean indicating whether or not to require clients
-      to be authenticated. May only be True if root_certificates is not None.
-
-  Returns:
-    A ServerCredentials for use with an SSL-enabled Server.
-  """
-  if len(private_key_certificate_chain_pairs) == 0:
-    raise ValueError(
-        'At least one private key-certificate chain pairis required!')
-  elif require_client_auth and root_certificates is None:
-    raise ValueError(
-        'Illegal to require client auth without providing root certificates!')
-  else:
-    return ServerCredentials(_low.server_credentials_ssl(
-        root_certificates, private_key_certificate_chain_pairs,
-        require_client_auth))
+ServerCredentials = grpc.ServerCredentials
+ssl_server_credentials = grpc.ssl_server_credentials
 
 
 class ServerOptions(object):
@@ -452,9 +301,8 @@ def server(service_implementations, options=None):
     An interfaces.Server with which RPCs can be serviced.
   """
   effective_options = _EMPTY_SERVER_OPTIONS if options is None else options
-  return _server.server(
+  return _server_adaptations.server(
       service_implementations, effective_options.multi_method_implementation,
       effective_options.request_deserializers,
       effective_options.response_serializers, effective_options.thread_pool,
-      effective_options.thread_pool_size, effective_options.default_timeout,
-      effective_options.maximum_timeout)
+      effective_options.thread_pool_size)
diff --git a/src/python/grpcio/grpc/beta/interfaces.py b/src/python/grpcio/grpc/beta/interfaces.py
index 24de9ad1a8ec855e6cf0ed427fd50915936587c5..4343b6c4b52986cd70f0adab7bcc5a32f1517f51 100644
--- a/src/python/grpcio/grpc/beta/interfaces.py
+++ b/src/python/grpcio/grpc/beta/interfaces.py
@@ -30,53 +30,13 @@
 """Constants and interfaces of the Beta API of gRPC Python."""
 
 import abc
-import enum
 
 import six
 
-from grpc._adapter import _types
+import grpc
 
-
-@enum.unique
-class ChannelConnectivity(enum.Enum):
-  """Mirrors grpc_connectivity_state in the gRPC Core.
-
-  Attributes:
-    IDLE: The channel is idle.
-    CONNECTING: The channel is connecting.
-    READY: The channel is ready to conduct RPCs.
-    TRANSIENT_FAILURE: The channel has seen a failure from which it expects to
-      recover.
-    FATAL_FAILURE: The channel has seen a failure from which it cannot recover.
-  """
-  IDLE = (_types.ConnectivityState.IDLE, 'idle',)
-  CONNECTING = (_types.ConnectivityState.CONNECTING, 'connecting',)
-  READY = (_types.ConnectivityState.READY, 'ready',)
-  TRANSIENT_FAILURE = (
-      _types.ConnectivityState.TRANSIENT_FAILURE, 'transient failure',)
-  FATAL_FAILURE = (_types.ConnectivityState.FATAL_FAILURE, 'fatal failure',)
-
-
-@enum.unique
-class StatusCode(enum.Enum):
-  """Mirrors grpc_status_code in the C core."""
-  OK                  = 0
-  CANCELLED           = 1
-  UNKNOWN             = 2
-  INVALID_ARGUMENT    = 3
-  DEADLINE_EXCEEDED   = 4
-  NOT_FOUND           = 5
-  ALREADY_EXISTS      = 6
-  PERMISSION_DENIED   = 7
-  RESOURCE_EXHAUSTED  = 8
-  FAILED_PRECONDITION = 9
-  ABORTED             = 10
-  OUT_OF_RANGE        = 11
-  UNIMPLEMENTED       = 12
-  INTERNAL            = 13
-  UNAVAILABLE         = 14
-  DATA_LOSS           = 15
-  UNAUTHENTICATED     = 16
+ChannelConnectivity = grpc.ChannelConnectivity
+StatusCode = grpc.StatusCode
 
 
 class GRPCCallOptions(object):
@@ -106,46 +66,9 @@ def grpc_call_options(disable_compression=False, credentials=None):
   """
   return GRPCCallOptions(disable_compression, None, credentials)
 
-
-class GRPCAuthMetadataContext(six.with_metaclass(abc.ABCMeta)):
-  """Provides information to call credentials metadata plugins.
-
-  Attributes:
-    service_url: A string URL of the service being called into.
-    method_name: A string of the fully qualified method name being called.
-  """
-
-
-class GRPCAuthMetadataPluginCallback(six.with_metaclass(abc.ABCMeta)):
-  """Callback object received by a metadata plugin."""
-
-  def __call__(self, metadata, error):
-    """Inform the gRPC runtime of the metadata to construct a CallCredentials.
-
-    Args:
-      metadata: An iterable of 2-sequences (e.g. tuples) of metadata key/value
-        pairs.
-      error: An Exception to indicate error or None to indicate success.
-    """
-    raise NotImplementedError()
-
-
-class GRPCAuthMetadataPlugin(six.with_metaclass(abc.ABCMeta)):
-  """
-  """
-
-  def __call__(self, context, callback):
-    """Invoke the plugin.
-
-    Must not block. Need only be called by the gRPC runtime.
-
-    Args:
-      context: A GRPCAuthMetadataContext providing information on what the
-        plugin is being used for.
-      callback: A GRPCAuthMetadataPluginCallback to be invoked either
-        synchronously or asynchronously.
-    """
-    raise NotImplementedError()
+GRPCAuthMetadataContext = grpc.AuthMetadataContext
+GRPCAuthMetadataPluginCallback = grpc.AuthMetadataPluginCallback
+GRPCAuthMetadataPlugin = grpc.AuthMetadataPlugin
 
 
 class GRPCServicerContext(six.with_metaclass(abc.ABCMeta)):
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 84c83af8a83b3fec4cf9be40072184cbd539f37b..b4b70a49999e791d59f1720060c245c99dbd0028 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -231,9 +231,6 @@ CORE_SOURCE_FILES = [
   'src/core/ext/client_config/uri_parser.c',
   'src/core/ext/transport/chttp2/server/insecure/server_chttp2.c',
   'src/core/ext/transport/chttp2/client/insecure/channel_create.c',
-  'src/core/ext/transport/cronet/client/secure/cronet_channel_create.c',
-  'src/core/ext/transport/cronet/transport/cronet_api_dummy.c',
-  'src/core/ext/transport/cronet/transport/cronet_transport.c',
   'src/core/ext/lb_policy/grpclb/load_balancer_api.c',
   'src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
   'third_party/nanopb/pb_common.c',
diff --git a/src/python/grpcio/tests/unit/beta/_auth_test.py b/src/python/grpcio/tests/unit/_auth_test.py
similarity index 99%
rename from src/python/grpcio/tests/unit/beta/_auth_test.py
rename to src/python/grpcio/tests/unit/_auth_test.py
index 694928a91b7309bd25c3a6c9e1b73e6fdf158d77..c31f7b06f7315910e51dbc85990764efa02a7d1d 100644
--- a/src/python/grpcio/tests/unit/beta/_auth_test.py
+++ b/src/python/grpcio/tests/unit/_auth_test.py
@@ -33,7 +33,7 @@ import collections
 import threading
 import unittest
 
-from grpc.beta import _auth
+from grpc import _auth
 
 
 class MockGoogleCreds(object):
diff --git a/src/python/grpcio/tests/unit/beta/test_utilities.py b/src/python/grpcio/tests/unit/beta/test_utilities.py
index 0313e06a93e5ded7d34772259628945ba8d260fe..66b5f72897cc56f5c11ae7fdea03f5dd5e92fb8d 100644
--- a/src/python/grpcio/tests/unit/beta/test_utilities.py
+++ b/src/python/grpcio/tests/unit/beta/test_utilities.py
@@ -29,7 +29,7 @@
 
 """Test-appropriate entry points into the gRPC Python Beta API."""
 
-from grpc._adapter import _intermediary_low
+import grpc
 from grpc.beta import implementations
 
 
@@ -48,9 +48,8 @@ def not_really_secure_channel(
     An implementations.Channel to the remote host through which RPCs may be
       conducted.
   """
-  hostport = '%s:%d' % (host, port)
-  intermediary_low_channel = _intermediary_low.Channel(
-      hostport, channel_credentials._low_credentials,
-      server_host_override=server_host_override)
-  return implementations.Channel(
-      intermediary_low_channel._internal, intermediary_low_channel)
+  target = '%s:%d' % (host, port)
+  channel = grpc.secure_channel(
+      target, ((b'grpc.ssl_target_name_override', server_host_override,),),
+      channel_credentials._credentials)
+  return implementations.Channel(channel)
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index 1510191e780f3ed7b6f71ce160b989b26c9b19ba..f76462649d281cd19ead829842f96320853b2894 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -126,7 +126,6 @@ grpc_header_key_is_legal_type grpc_header_key_is_legal_import;
 grpc_header_nonbin_value_is_legal_type grpc_header_nonbin_value_is_legal_import;
 grpc_is_binary_header_type grpc_is_binary_header_import;
 grpc_call_error_to_string_type grpc_call_error_to_string_import;
-grpc_cronet_secure_channel_create_type grpc_cronet_secure_channel_create_import;
 grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
 grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
@@ -394,7 +393,6 @@ void grpc_rb_load_imports(HMODULE library) {
   grpc_header_nonbin_value_is_legal_import = (grpc_header_nonbin_value_is_legal_type) GetProcAddress(library, "grpc_header_nonbin_value_is_legal");
   grpc_is_binary_header_import = (grpc_is_binary_header_type) GetProcAddress(library, "grpc_is_binary_header");
   grpc_call_error_to_string_import = (grpc_call_error_to_string_type) GetProcAddress(library, "grpc_call_error_to_string");
-  grpc_cronet_secure_channel_create_import = (grpc_cronet_secure_channel_create_type) GetProcAddress(library, "grpc_cronet_secure_channel_create");
   grpc_auth_property_iterator_next_import = (grpc_auth_property_iterator_next_type) GetProcAddress(library, "grpc_auth_property_iterator_next");
   grpc_auth_context_property_iterator_import = (grpc_auth_context_property_iterator_type) GetProcAddress(library, "grpc_auth_context_property_iterator");
   grpc_auth_context_peer_identity_import = (grpc_auth_context_peer_identity_type) GetProcAddress(library, "grpc_auth_context_peer_identity");
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index dfaabf1d476b61ed4f5fd127f60bb575f09019a1..5d690a915d8d6d33975a82c64ca960592132e334 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -43,7 +43,6 @@
 #include <grpc/census.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
-#include <grpc/grpc_cronet.h>
 #include <grpc/grpc_security.h>
 #include <grpc/impl/codegen/alloc.h>
 #include <grpc/impl/codegen/byte_buffer.h>
@@ -329,9 +328,6 @@ extern grpc_is_binary_header_type grpc_is_binary_header_import;
 typedef const char *(*grpc_call_error_to_string_type)(grpc_call_error error);
 extern grpc_call_error_to_string_type grpc_call_error_to_string_import;
 #define grpc_call_error_to_string grpc_call_error_to_string_import
-typedef grpc_channel *(*grpc_cronet_secure_channel_create_type)(void *engine, const char *target, const grpc_channel_args *args, void *reserved);
-extern grpc_cronet_secure_channel_create_type grpc_cronet_secure_channel_create_import;
-#define grpc_cronet_secure_channel_create grpc_cronet_secure_channel_create_import
 typedef const grpc_auth_property *(*grpc_auth_property_iterator_next_type)(grpc_auth_property_iterator *it);
 extern grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 #define grpc_auth_property_iterator_next grpc_auth_property_iterator_next_import
diff --git a/templates/test/core/surface/public_headers_must_be_c89.c.template b/templates/test/core/surface/public_headers_must_be_c89.c.template
index f02ef9590d1f8cbbe0a7eaff852749a90c96cfca..d33ffda583ba990e4fdce8c2444ddd1d6ae92f04 100644
--- a/templates/test/core/surface/public_headers_must_be_c89.c.template
+++ b/templates/test/core/surface/public_headers_must_be_c89.c.template
@@ -46,6 +46,7 @@
     if lib.language != 'c': continue
     for hdr in lib.get('public_headers', []):
       if is_platform_header(hdr): continue
+      if 'grpc_cronet.h' in hdr: continue
       assert(hdr[0:len(pfx)] == pfx)
       hdrs.add(hdr[len(pfx):])
   hdrs = sorted(list(hdrs))
diff --git a/test/core/surface/public_headers_must_be_c89.c b/test/core/surface/public_headers_must_be_c89.c
index fd6ff2c26f5ecca7a8654232a6fdf056370f446b..3eeb55d033dcaa296d15bf1a368ad378a60b8296 100644
--- a/test/core/surface/public_headers_must_be_c89.c
+++ b/test/core/surface/public_headers_must_be_c89.c
@@ -36,7 +36,6 @@
 #include <grpc/census.h>
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
-#include <grpc/grpc_cronet.h>
 #include <grpc/grpc_security.h>
 #include <grpc/grpc_security_constants.h>
 #include <grpc/impl/codegen/alloc.h>
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index f1bd79dd5225d9194c8559c93f125b6fea523411..7489401d74b6144c6f05100092ae52cb2c67e215 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -786,7 +786,6 @@ include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
 include/grpc/impl/codegen/time.h \
-include/grpc/grpc_cronet.h \
 include/grpc/grpc_security.h \
 include/grpc/grpc_security_constants.h \
 include/grpc/census.h \
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index c354ad10aeae21d761bbba942e4c81959a685f79..0496accca587ee4b82c19c027ea649394b592f1f 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -786,7 +786,6 @@ include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
 include/grpc/impl/codegen/sync_windows.h \
 include/grpc/impl/codegen/time.h \
-include/grpc/grpc_cronet.h \
 include/grpc/grpc_security.h \
 include/grpc/grpc_security_constants.h \
 include/grpc/census.h \
@@ -924,7 +923,6 @@ src/core/ext/client_config/subchannel.h \
 src/core/ext/client_config/subchannel_call_holder.h \
 src/core/ext/client_config/subchannel_index.h \
 src/core/ext/client_config/uri_parser.h \
-third_party/objective_c/Cronet/cronet_c_for_grpc.h \
 src/core/ext/lb_policy/grpclb/load_balancer_api.h \
 src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.h \
 third_party/nanopb/pb.h \
@@ -1095,9 +1093,6 @@ src/core/ext/client_config/subchannel_index.c \
 src/core/ext/client_config/uri_parser.c \
 src/core/ext/transport/chttp2/server/insecure/server_chttp2.c \
 src/core/ext/transport/chttp2/client/insecure/channel_create.c \
-src/core/ext/transport/cronet/client/secure/cronet_channel_create.c \
-src/core/ext/transport/cronet/transport/cronet_api_dummy.c \
-src/core/ext/transport/cronet/transport/cronet_transport.c \
 src/core/ext/lb_policy/grpclb/load_balancer_api.c \
 src/core/ext/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c \
 third_party/nanopb/pb_common.c \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index b30ff4bbc6d879ce6c175fce07520171c114b193..a023bb7fdf8c2374c6a28cbaa382ca8d2ba14873 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -4093,8 +4093,7 @@
       "grpc_transport_chttp2_client_insecure", 
       "grpc_transport_chttp2_client_secure", 
       "grpc_transport_chttp2_server_insecure", 
-      "grpc_transport_chttp2_server_secure", 
-      "grpc_transport_cronet_client_secure"
+      "grpc_transport_chttp2_server_secure"
     ], 
     "headers": [], 
     "language": "c", 
@@ -4105,6 +4104,22 @@
     "third_party": false, 
     "type": "lib"
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "grpc_base", 
+      "grpc_transport_chttp2_client_secure", 
+      "grpc_transport_cronet_client_secure"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "grpc_cronet", 
+    "src": [
+      "src/core/lib/surface/init.c"
+    ], 
+    "third_party": false, 
+    "type": "lib"
+  }, 
   {
     "deps": [
       "gpr", 
@@ -6008,7 +6023,6 @@
       "tsi"
     ], 
     "headers": [
-      "include/grpc/grpc_cronet.h", 
       "include/grpc/grpc_security.h", 
       "include/grpc/grpc_security_constants.h", 
       "src/core/lib/security/context/security_context.h", 
@@ -6033,7 +6047,6 @@
     "language": "c", 
     "name": "grpc_secure", 
     "src": [
-      "include/grpc/grpc_cronet.h", 
       "include/grpc/grpc_security.h", 
       "include/grpc/grpc_security_constants.h", 
       "src/core/lib/http/httpcli_security_connector.c", 
@@ -6292,11 +6305,17 @@
       "grpc_transport_chttp2"
     ], 
     "headers": [
+      "include/grpc/grpc_cronet.h", 
+      "include/grpc/grpc_security.h", 
+      "include/grpc/grpc_security_constants.h", 
       "third_party/objective_c/Cronet/cronet_c_for_grpc.h"
     ], 
     "language": "c", 
     "name": "grpc_transport_cronet_client_secure", 
     "src": [
+      "include/grpc/grpc_cronet.h", 
+      "include/grpc/grpc_security.h", 
+      "include/grpc/grpc_security_constants.h", 
       "src/core/ext/transport/cronet/client/secure/cronet_channel_create.c", 
       "src/core/ext/transport/cronet/transport/cronet_api_dummy.c", 
       "src/core/ext/transport/cronet/transport/cronet_transport.c"
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 0124570f267dee5848853306225277883cf7e27e..14f96d12fb9197eb085e028ea381016725a3793f 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -293,7 +293,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\sync_windows.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h" />
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_cronet.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security_constants.h" />
     <ClInclude Include="$(SolutionDir)\..\include\grpc\census.h" />
@@ -433,7 +432,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\client_config\subchannel_call_holder.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\client_config\subchannel_index.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\client_config\uri_parser.h" />
-    <ClInclude Include="$(SolutionDir)\..\third_party\objective_c\Cronet\cronet_c_for_grpc.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v1\load_balancer.pb.h" />
     <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb.h" />
@@ -761,12 +759,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\cronet\client\secure\cronet_channel_create.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\cronet\transport\cronet_api_dummy.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\cronet\transport\cronet_transport.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v1\load_balancer.pb.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 0f74953d73b0f9c9bae42a5426b26214e1337790..1b188e51988955ef1faa0b738bf64e83b0436db1 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -466,15 +466,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
       <Filter>src\core\ext\transport\chttp2\client\insecure</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\cronet\client\secure\cronet_channel_create.c">
-      <Filter>src\core\ext\transport\cronet\client\secure</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\cronet\transport\cronet_api_dummy.c">
-      <Filter>src\core\ext\transport\cronet\transport</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\cronet\transport\cronet_transport.c">
-      <Filter>src\core\ext\transport\cronet\transport</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.c">
       <Filter>src\core\ext\lb_policy\grpclb</Filter>
     </ClCompile>
@@ -621,9 +612,6 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\impl\codegen\time.h">
       <Filter>include\grpc\impl\codegen</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_cronet.h">
-      <Filter>include\grpc</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security.h">
       <Filter>include\grpc</Filter>
     </ClInclude>
@@ -1037,9 +1025,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\client_config\uri_parser.h">
       <Filter>src\core\ext\client_config</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\third_party\objective_c\Cronet\cronet_c_for_grpc.h">
-      <Filter>third_party\objective_c\Cronet</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.h">
       <Filter>src\core\ext\lb_policy\grpclb</Filter>
     </ClInclude>
@@ -1187,18 +1172,6 @@
     <Filter Include="src\core\ext\transport\chttp2\transport">
       <UniqueIdentifier>{6f34254e-e69f-c9b4-156d-5024bade5408}</UniqueIdentifier>
     </Filter>
-    <Filter Include="src\core\ext\transport\cronet">
-      <UniqueIdentifier>{1e9c85e9-5522-7ef8-0017-7e19990a6194}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="src\core\ext\transport\cronet\client">
-      <UniqueIdentifier>{d0530883-75d9-b5f7-d594-26735a70ac7b}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="src\core\ext\transport\cronet\client\secure">
-      <UniqueIdentifier>{4fa6fe90-b7a8-5c8f-d629-db1e68d89eed}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="src\core\ext\transport\cronet\transport">
-      <UniqueIdentifier>{31518af8-5860-6d0d-ff78-4059fce29ec2}</UniqueIdentifier>
-    </Filter>
     <Filter Include="src\core\lib">
       <UniqueIdentifier>{5b2ded3f-84a5-f6b4-2060-286c7d1dc945}</UniqueIdentifier>
     </Filter>
@@ -1277,12 +1250,6 @@
     <Filter Include="third_party\nanopb">
       <UniqueIdentifier>{93d6596d-330c-1d27-6f84-3c840e57869e}</UniqueIdentifier>
     </Filter>
-    <Filter Include="third_party\objective_c">
-      <UniqueIdentifier>{3a56a516-857e-d2aa-95cc-11685baf4e8c}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="third_party\objective_c\Cronet">
-      <UniqueIdentifier>{a165c6e3-0776-6f40-7351-d7865668e220}</UniqueIdentifier>
-    </Filter>
   </ItemGroup>
 </Project>