diff --git a/src/csharp/buildall.bat b/src/csharp/buildall.bat
index d85896c255bcbc6e6aa6ef5e6921ca5fa38c0606..6173629ddd22b2cffb0fea0d514ebf04990c9528 100644
--- a/src/csharp/buildall.bat
+++ b/src/csharp/buildall.bat
@@ -8,6 +8,12 @@ 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:PlatformToolset=v120 || goto :error