Squashed 'libs/protobuf/' content from commit fcd3b9a85

git-subtree-dir: libs/protobuf
git-subtree-split: fcd3b9a85ef36e46643dc30176cea1a7ad62e02b

csharp/build_packages.bat

@@ -0,0 +1,10 @@
+@rem Builds Google.Protobuf NuGet packages
+
+dotnet restore src/Google.Protobuf.sln
+dotnet pack -c Release src/Google.Protobuf.sln -p:ContinuousIntegrationBuild=true || goto :error
+
+goto :EOF
+
+:error
+echo Failed!
+exit /b %errorlevel%