gRPC services with C#

Add a .proto file to a C# app

<ItemGroup>
  <Protobuf Include="Protos\greet.proto" GrpcServices="Server" />
</ItemGroup>

C# Tooling support for .proto files

Server:

<PackageReference Include="Grpc.AspNetCore" Version="2.28.0" />

Client:

<PackageReference Include="Google.Protobuf" Version="3.11.4" />
<PackageReference Include="Grpc.Net.Client" Version="2.28.0" />
<PackageReference Include="Grpc.Tools" Version="2.28.1">

Generated C# assets

Server Side:

To ensure only the server assets are generated in a server project, the GrpcServices attribute is set to Server.

<ItemGroup>
  <Protobuf Include="Protos\greet.proto" GrpcServices="Server" />
</ItemGroup>

public class GreeterService : Greeter.GreeterBase
{
    private readonly ILogger<GreeterService> _logger;
    public GreeterService(ILogger<GreeterService> logger)
    {
        _logger = logger;
    }

    public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
    {
        return Task.FromResult(new HelloReply
        {
            Message = "Hello " + request.Name
        });
    }
}

Client Side:

static async Task Main(string[] args)
{
    // The port number(5001) must match the port of the gRPC server.
    using var channel = GrpcChannel.ForAddress("https://localhost:5001");
    var client =  new Greeter.GreeterClient(channel);
    var reply = await client.SayHelloAsync(
                      new HelloRequest { Name = "GreeterClient" });
    Console.WriteLine("Greeting: " + reply.Message);
    Console.WriteLine("Press any key to exit...");
    Console.ReadKey();
}

References
https://docs.microsoft.com/en-us/aspnet/core/grpc/basics?view=aspnetcore-5.0

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