remove stale buildall.bat script and update readme

src/csharp/README.md

@@ -37,23 +37,15 @@ BUILD FROM SOURCE
 You only need to go through these steps if you are planning to develop gRPC C#.
 If you are a user of gRPC C#, go to Usage section above.
 
-**Windows**
+**Windows, Linux or Mac OS X**
 
-- The grpc_csharp_ext native library needs to be built so you can build the gRPC C# solution. Open the
-  solution `vsprojects/grpc_csharp_ext.sln` in Visual Studio and build it.
-
-- Open `src\csharp\Grpc.sln` (path is relative to gRPC repository root)
-  using Visual Studio
-
-**Linux and Mac OS X**
-
-- The grpc_csharp_ext native library needs to be built so you can build the gRPC C# solution:
-  ```sh
+- The easiest way to build is using the `run_tests.py` script that will take care of building the `grpc_csharp_ext` native library:
+  ```
   # from the gRPC repository root
-  $ tools/run_tests/run_tests.py -c dbg -l csharp --build_only
+  $ python tools/run_tests/run_tests.py -c dbg -l csharp --build_only
   ```
 
-- Use MonoDevelop / Xamarin Studio to open the solution Grpc.sln
+- Use Visual Studio / MonoDevelop / Xamarin Studio to open the solution Grpc.sln
 
 RUNNING TESTS
 -------------

src/csharp/buildall.bat

-@rem Copyright 2016, Google Inc.
-@rem All rights reserved.
-@rem
-@rem Redistribution and use in source and binary forms, with or without
-@rem modification, are permitted provided that the following conditions are
-@rem met:
-@rem
-@rem     * Redistributions of source code must retain the above copyright
-@rem notice, this list of conditions and the following disclaimer.
-@rem     * Redistributions in binary form must reproduce the above
-@rem copyright notice, this list of conditions and the following disclaimer
-@rem in the documentation and/or other materials provided with the
-@rem distribution.
-@rem     * Neither the name of Google Inc. nor the names of its
-@rem contributors may be used to endorse or promote products derived from
-@rem this software without specific prior written permission.
-@rem
-@rem THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-@rem "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-@rem LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-@rem A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-@rem OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-@rem SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-@rem LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-@rem DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-@rem THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-@rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-@rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-@rem Convenience script to build gRPC C# from command line
-
-setlocal
-
-@rem enter this directory
-cd /d %~dp0
-
-@rem Set VS variables (uses Visual Studio 2013)
-@call "%VS120COMNTOOLS%\..\..\vc\vcvarsall.bat" x86
-
-@rem Fetch all dependencies
-nuget restore ..\..\vsprojects\grpc.sln || goto :error
-nuget restore ..\..\vsprojects\grpc_csharp_ext.sln || goto :error
-nuget restore ..\..\vsprojects\grpc_protoc_plugins.sln || goto :error
-nuget restore Grpc.sln || goto :error
-
-@rem Build the C# native extension
-msbuild ..\..\vsprojects\grpc_csharp_ext.sln /p:Configuration=Debug /p:PlatformToolset=v120 || goto :error
-msbuild ..\..\vsprojects\grpc_csharp_ext.sln /p:Configuration=Release /p:PlatformToolset=v120 || goto :error
-
-msbuild Grpc.sln /p:Configuration=Debug || goto :error
-msbuild Grpc.sln /p:Configuration=Release || goto :error
-
-endlocal
-
-goto :EOF
-
-:error
-echo Failed!
-exit /b %errorlevel%