I’m not a Windows/Visual Studio person, so maybe I’m doing something obviously wrong. I’m going to have to write a gRPC wrapper around a library for .NET 4.8. That means I won’t be able to use the newer grpc-dotnet and should use the older Grpc.Core library.

As far as I can tell, I need to manually generate the C# code using protoc, so I’m using this command:

protoc --proto_path=. --csharp_out=grpc .greet.proto --grpc_out=grpc --plugin=protoc-gen-grpc="C:usersfoo.nugetpackagesgrpc.tools.5.0toolsgrpc_csharp_plugin.exe"

I get two files Greet.cs and GreetGrpc.cs which I add to my Visual Studio project. I’ve also added some nuggets I thought are relevant (Google.Protobuf, Grpc.Core, Grpc.Tools, Grpc.Net.Client). The generated code does not compile though.

For example this line:

static readonly Marshaller<global::Greet.HelloRequest> __Marshaller_HelloRequest = Marshallers.Create((arg) => arg.ToByteArray(), global::Greet.HelloRequest.ParseFrom);

would cause an error:

‘HelloRequest’ does not contain a definition for ‘ParseFrom’

Also this line:

static readonly Method<global::Greet.PrepareRequest, global::Greet.PrepareResponse> __Method_Prepare = new Method<global::Greet.PrepareRequest, global::Greet.PrepareResponse>(
    MethodType.Unary,
    "Prepare",
    __Marshaller_PrepareRequest,
    __Marshaller_PrepareResponse);

causes:

There is no argument given that corresponds to the required parameter ‘responseMarshaller’ of ‘Method<PrepareRequest, PrepareResponse>.Method(MethodType, string, string, Marshaller, Marshaller)’

I would appreciate any help.