prepare for move

grpc-common/csharp/route_guide/.nuget/packages.config

grpc-common/csharp/route_guide/README.md

grpc-common/csharp/route_guide/RouteGuide.sln

.../csharp/route_guide/RouteGuide/Properties/AssemblyInfo.cs

grpc-common/csharp/route_guide/RouteGuide/RouteGuide.cs

grpc-common/csharp/route_guide/RouteGuide/RouteGuide.csproj

grpc-common/csharp/route_guide/RouteGuide/RouteGuideGrpc.cs

grpc-common/csharp/route_guide/RouteGuide/RouteGuideUtil.cs

grpc-common/csharp/route_guide/RouteGuide/packages.config

...on/csharp/route_guide/RouteGuide/protos/route_guide.proto

...-common/csharp/route_guide/RouteGuide/route_guide_db.json

grpc-common/csharp/route_guide/RouteGuideClient/App.config

grpc-common/csharp/route_guide/RouteGuideClient/Program.cs

...p/route_guide/RouteGuideClient/Properties/AssemblyInfo.cs

...harp/route_guide/RouteGuideClient/RouteGuideClient.csproj

...ommon/csharp/route_guide/RouteGuideClient/packages.config

grpc-common/csharp/route_guide/RouteGuideServer/App.config

grpc-common/csharp/route_guide/RouteGuideServer/Program.cs

...p/route_guide/RouteGuideServer/Properties/AssemblyInfo.cs

...mon/csharp/route_guide/RouteGuideServer/RouteGuideImpl.cs