diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.csproj b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
index 1fa14fc3dfb2031a69ce22ab27cb5b4e924cdf5c..7a6955311ac3510cf08606d3fb4d482f1e1d8eb5 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.csproj
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
@@ -39,30 +39,25 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="BouncyCastle.Crypto, Version=1.7.4137.9688, Culture=neutral, PublicKeyToken=a4292a325f69b123, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
+    <Reference Include="System" />
+    <Reference Include="System.Net" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Net.Http.WebRequest" />
+    <Reference Include="BouncyCastle.Crypto">
       <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.dll</HintPath>
+    <Reference Include="Newtonsoft.Json">
+      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+    <Reference Include="Google.Apis.Core">
+      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Core, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Core.1.11.1\lib\net45\Google.Apis.Core.dll</HintPath>
+    <Reference Include="Google.Apis.Auth">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
-    <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    <Reference Include="Google.Apis.Auth.PlatformServices">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
-    <Reference Include="System" />
-    <Reference Include="System.Net" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Net.Http.WebRequest" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.nuspec b/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
index 4baed3704c401d409b49ed6227c6835434cdcd12..a1f5668e2e02cea9dd6eaf7a28175f0b32f7b0d7 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
@@ -15,7 +15,7 @@
     <copyright>Copyright 2015, Google Inc.</copyright>
     <tags>gRPC RPC Protocol HTTP/2 Auth OAuth2</tags>
 	<dependencies>
-	  <dependency id="Google.Apis.Auth" version="1.11.1" />
+	  <dependency id="Google.Apis.Auth" version="1.15.0" />
 	  <dependency id="Grpc.Core" version="$version$" />
     </dependencies>
   </metadata>
diff --git a/src/csharp/Grpc.Auth/packages.config b/src/csharp/Grpc.Auth/packages.config
index c20d9ceed6a180a50151be916f2c4d12628dc1bf..738d3e6f3b6c8340fe60dbc80f99e83577d5aa15 100644
--- a/src/csharp/Grpc.Auth/packages.config
+++ b/src/csharp/Grpc.Auth/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 6a1c9fc99005a35e8ed813244192835e83fd8df1..ffa4e7cb4545a3e5a55a82e5b308608fc2b8d68c 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -23,13 +23,13 @@
   },
   "dependencies": {
     "Grpc.Core": "1.0.0-pre2",
-    "Google.Apis.Auth": "1.11.1"
+    "Google.Apis.Auth": "1.15.0"
   },
   "frameworks": {
     "net45": { },
     "netstandard1.5": {
       "imports": [
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
         "Microsoft.NETCore.Portable.Compatibility": "1.0.1",
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
index 91fb3ce5bcf4233c5dc26a49ad626a22a76d3d09..6816b5c5a2d43f1733181177991e10d3ce0063af 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
@@ -39,30 +39,25 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="BouncyCastle.Crypto, Version=1.7.4137.9688, Culture=neutral, PublicKeyToken=a4292a325f69b123, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
+    <Reference Include="System" />
+    <Reference Include="System.Net" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Net.Http.WebRequest" />
+    <Reference Include="BouncyCastle.Crypto">
       <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.dll</HintPath>
+    <Reference Include="Newtonsoft.Json">
+      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+    <Reference Include="Google.Apis.Core">
+      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Core, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Core.1.11.1\lib\net45\Google.Apis.Core.dll</HintPath>
+    <Reference Include="Google.Apis.Auth">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
-    <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    <Reference Include="Google.Apis.Auth.PlatformServices">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
-    <Reference Include="System" />
-    <Reference Include="System.Net" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Net.Http.WebRequest" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/packages.config b/src/csharp/Grpc.IntegrationTesting.Client/packages.config
index c20d9ceed6a180a50151be916f2c4d12628dc1bf..738d3e6f3b6c8340fe60dbc80f99e83577d5aa15 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting.Client/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
index dda26a68923a18268808d2f838a1278402c10f38..593bf0939db7ce342a497395aaa2bcdae40a6878 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
@@ -58,7 +58,6 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <None Include="app.config" />
     <None Include="Grpc.IntegrationTesting.QpsWorker.project.json" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/app.config b/src/csharp/Grpc.IntegrationTesting.QpsWorker/app.config
deleted file mode 100644
index e204447bb349a84b275013dea0707aea84300fcc..0000000000000000000000000000000000000000
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/app.config
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.29.0" newVersion="4.2.29.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="Google.Apis.Core" publicKeyToken="4b01fa6e34db77ab" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-1.11.1.0" newVersion="1.11.1.0" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
index f73d99dbd1a06124c340ff758f1b85c664df0b71..987387ca25982ac6e60ac1eb42d7f86d679ec4e3 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
@@ -39,30 +39,25 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="BouncyCastle.Crypto, Version=1.7.4137.9688, Culture=neutral, PublicKeyToken=a4292a325f69b123, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
+    <Reference Include="System" />
+    <Reference Include="System.Net" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Net.Http.WebRequest" />
+    <Reference Include="BouncyCastle.Crypto">
       <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.dll</HintPath>
+    <Reference Include="Newtonsoft.Json">
+      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+    <Reference Include="Google.Apis.Core">
+      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Core, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Core.1.11.1\lib\net45\Google.Apis.Core.dll</HintPath>
+    <Reference Include="Google.Apis.Auth">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
-    <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    <Reference Include="Google.Apis.Auth.PlatformServices">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
-    <Reference Include="System" />
-    <Reference Include="System.Net" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Net.Http.WebRequest" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/packages.config b/src/csharp/Grpc.IntegrationTesting.Server/packages.config
index c20d9ceed6a180a50151be916f2c4d12628dc1bf..738d3e6f3b6c8340fe60dbc80f99e83577d5aa15 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting.Server/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
index 7512d2a5d11567e7524a460a78bf713bb96c8402..df1d76765e2f94be1d498d64bb73f8c2f85ddc37 100644
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
@@ -51,15 +51,6 @@
     <Reference Include="BouncyCastle.Crypto">
       <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.11.1\lib\net45\Google.Apis.Core.dll</HintPath>
-    </Reference>
     <Reference Include="Google.Protobuf">
       <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
     </Reference>
@@ -75,6 +66,15 @@
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Apis.Core">
+      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth.PlatformServices">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
index ec407d3fcf49a5a89e0ca567e86031efce71705d..2747c0e5b76ac69fef021004bb6bc047e2eeab5a 100644
--- a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
+++ b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
@@ -145,26 +145,16 @@ namespace Grpc.IntegrationTesting
 
             if (options.TestCase == "jwt_token_creds")
             {
-#if !NETCOREAPP1_0
                 var googleCredential = await GoogleCredential.GetApplicationDefaultAsync();
                 Assert.IsTrue(googleCredential.IsCreateScopedRequired);
                 credentials = ChannelCredentials.Create(credentials, googleCredential.ToCallCredentials());
-#else
-                // TODO(jtattermusch): implement this
-                throw new NotImplementedException("Not supported on CoreCLR yet");
-#endif
             }
 
             if (options.TestCase == "compute_engine_creds")
             {
-#if !NETCOREAPP1_0
                 var googleCredential = await GoogleCredential.GetApplicationDefaultAsync();
                 Assert.IsFalse(googleCredential.IsCreateScopedRequired);
                 credentials = ChannelCredentials.Create(credentials, googleCredential.ToCallCredentials());
-#else
-                // TODO(jtattermusch): implement this
-                throw new NotImplementedException("Not supported on CoreCLR yet");
-#endif
             }
             return credentials;
         }
@@ -395,7 +385,6 @@ namespace Grpc.IntegrationTesting
 
         public static async Task RunOAuth2AuthTokenAsync(TestService.TestServiceClient client, string oauthScope)
         {
-#if !NETCOREAPP1_0
             Console.WriteLine("running oauth2_auth_token");
             ITokenAccess credential = (await GoogleCredential.GetApplicationDefaultAsync()).CreateScoped(new[] { oauthScope });
             string oauth2Token = await credential.GetAccessTokenForRequestAsync();
@@ -413,15 +402,10 @@ namespace Grpc.IntegrationTesting
             Assert.True(oauthScope.Contains(response.OauthScope));
             Assert.AreEqual(GetEmailFromServiceAccountFile(), response.Username);
             Console.WriteLine("Passed!");
-#else
-            // TODO(jtattermusch): implement this
-            throw new NotImplementedException("Not supported on CoreCLR yet");
-#endif
         }
 
         public static async Task RunPerRpcCredsAsync(TestService.TestServiceClient client, string oauthScope)
         {
-#if !NETCOREAPP1_0
             Console.WriteLine("running per_rpc_creds");
             ITokenAccess googleCredential = await GoogleCredential.GetApplicationDefaultAsync();
 
@@ -435,10 +419,6 @@ namespace Grpc.IntegrationTesting
 
             Assert.AreEqual(GetEmailFromServiceAccountFile(), response.Username);
             Console.WriteLine("Passed!");
-#else
-            // TODO(jtattermusch): implement this
-            throw new NotImplementedException("Not supported on CoreCLR yet");
-#endif
         }
 
         public static async Task RunCancelAfterBeginAsync(TestService.TestServiceClient client)
@@ -731,17 +711,12 @@ namespace Grpc.IntegrationTesting
         // extracts the client_email field from service account file used for auth test cases
         private static string GetEmailFromServiceAccountFile()
         {
-#if !NETCOREAPP1_0
             string keyFile = Environment.GetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS");
             Assert.IsNotNull(keyFile);
             var jobject = JObject.Parse(File.ReadAllText(keyFile));
             string email = jobject.GetValue("client_email").Value<string>();
             Assert.IsTrue(email.Length > 0);  // spec requires nonempty client email.
             return email;
-#else
-            // TODO(jtattermusch): implement this
-            throw new NotImplementedException("Not supported on CoreCLR yet");
-#endif
         }
 
         private static Metadata CreateTestMetadata()
diff --git a/src/csharp/Grpc.IntegrationTesting/packages.config b/src/csharp/Grpc.IntegrationTesting/packages.config
index e6e64e655816caadc7e0a50e81bfc1b6c9a79b1d..a78af9dc88593ffd925509eff53b7ad36030f762 100644
--- a/src/csharp/Grpc.IntegrationTesting/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting/packages.config
@@ -2,8 +2,8 @@
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
   <package id="CommandLineParser" version="1.9.71" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
   <package id="Moq" version="4.2.1510.2205" targetFramework="net45" />
diff --git a/templates/src/csharp/Grpc.Auth/project.json.template b/templates/src/csharp/Grpc.Auth/project.json.template
index b3244e4d3c94e80be862ba9934180572c12f50d7..19d4b42cf06a04ac3da1f15f36b9dba448a603ca 100644
--- a/templates/src/csharp/Grpc.Auth/project.json.template
+++ b/templates/src/csharp/Grpc.Auth/project.json.template
@@ -25,13 +25,13 @@
     },
     "dependencies": {
       "Grpc.Core": "${settings.csharp_version}",
-      "Google.Apis.Auth": "1.11.1"
+      "Google.Apis.Auth": "1.15.0"
     },
     "frameworks": {
       "net45": { },
       "netstandard1.5": {
         "imports": [
-          "net45"
+          "portable-net45"
         ],
         "dependencies": {
           "Microsoft.NETCore.Portable.Compatibility": "1.0.1",
diff --git a/test/distrib/csharp/DistribTest/App.config b/test/distrib/csharp/DistribTest/App.config
deleted file mode 100644
index 30d3e094721ff558f2d1e9a0fcfca065f05f37dd..0000000000000000000000000000000000000000
--- a/test/distrib/csharp/DistribTest/App.config
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-    <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
-    </startup>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.29.0" newVersion="4.2.29.0" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
\ No newline at end of file
diff --git a/test/distrib/csharp/DistribTest/DistribTest.csproj b/test/distrib/csharp/DistribTest/DistribTest.csproj
index 1acb34d1b2e4ba131af27fa4e0a4f9a0410d5265..6ca03b2c800cc1c47f03fb8f16537c8f38f1b9ed 100644
--- a/test/distrib/csharp/DistribTest/DistribTest.csproj
+++ b/test/distrib/csharp/DistribTest/DistribTest.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -41,6 +41,8 @@
     <ErrorReport>prompt</ErrorReport>
     <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
     <Prefer32Bit>true</Prefer32Bit>
+    <WarningLevel>4</WarningLevel>
+    <Optimize>false</Optimize>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x64'">
     <OutputPath>bin\x64\Release\</OutputPath>
@@ -51,39 +53,15 @@
     <ErrorReport>prompt</ErrorReport>
     <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
     <Prefer32Bit>true</Prefer32Bit>
+    <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="BouncyCastle.Crypto">
-      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.9.3\lib\net40\Google.Apis.Auth.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.9.3\lib\net40\Google.Apis.Auth.PlatformServices.dll</HintPath>
-    </Reference>
-    <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.9.3\lib\portable-net40+sl50+win+wpa81+wp80\Google.Apis.Core.dll</HintPath>
-    </Reference>
     <Reference Include="Grpc.Auth">
       <HintPath>..\packages\Grpc.Auth.__GRPC_NUGET_VERSION__\lib\net45\Grpc.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Grpc.Core">
       <HintPath>..\packages\Grpc.Core.__GRPC_NUGET_VERSION__\lib\net45\Grpc.Core.dll</HintPath>
     </Reference>
-    <Reference Include="Microsoft.Threading.Tasks">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
-    </Reference>
-    <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
-    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Interactive.Async">
@@ -91,25 +69,33 @@
     </Reference>
     <Reference Include="System.Net" />
     <Reference Include="System.Net.Http" />
-    <Reference Include="System.Net.Http.Extensions">
-      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="System.Net.Http.Primitives">
-      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Primitives.dll</HintPath>
-    </Reference>
     <Reference Include="System.Net.Http.WebRequest" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
+    <Reference Include="BouncyCastle.Crypto">
+      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
+    </Reference>
+    <Reference Include="Newtonsoft.Json">
+      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Core">
+      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth.PlatformServices">
+      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="App.config" />
     <None Include="packages.config" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
@@ -119,9 +105,7 @@
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
     <Error Condition="!Exists('..\packages\Grpc.Core.__GRPC_NUGET_VERSION__\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.__GRPC_NUGET_VERSION__\build\net45\Grpc.Core.targets'))" />
-    <Error Condition="!Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
   </Target>
-  <Import Project="..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/test/distrib/csharp/DistribTest/packages.config b/test/distrib/csharp/DistribTest/packages.config
index 69630193d02755067133b3ea86e842920cc760e9..e5d2d9d38313ad259f8eac07565c96adb65ef1ea 100644
--- a/test/distrib/csharp/DistribTest/packages.config
+++ b/test/distrib/csharp/DistribTest/packages.config
@@ -1,15 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.9.3" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.9.3" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
   <package id="Grpc" version="__GRPC_NUGET_VERSION__" targetFramework="net45" />
   <package id="Grpc.Auth" version="__GRPC_NUGET_VERSION__" targetFramework="net45" />
   <package id="Grpc.Core" version="__GRPC_NUGET_VERSION__" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.3" targetFramework="net45" />
-  <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net45" />
-  <package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>