Squashed 'third_party/protobuf/' content from commit e35e248

Change-Id: I6cbe123d09fe50fdcad0e51466665daeee7433c7
git-subtree-dir: third_party/protobuf
git-subtree-split: e35e24800fb8d694bdeea5fd63dc7d1b14d68723
diff --git a/csharp/build_packages.bat b/csharp/build_packages.bat
new file mode 100644
index 0000000..1502f06
--- /dev/null
+++ b/csharp/build_packages.bat
@@ -0,0 +1,13 @@
+@rem Builds Google.Protobuf NuGet packages
+
+@rem Adjust the location of nuget.exe
+set NUGET=C:\nuget\nuget.exe
+
+@rem Build src/Google.Protobuf.sln solution in Release configuration first.
+%NUGET% pack src\Google.Protobuf\Google.Protobuf.nuspec -Symbols || goto :error
+
+goto :EOF
+
+:error
+echo Failed!
+exit /b %errorlevel%