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gRPC vs. Graftcode

syntax = "proto3";

option csharp_namespace = "Acme.Users.V1";

service UserService {
  rpc GetUser (GetUserRequest) returns (User);
}

message GetUserRequest {
  int32 id = 1;
}

message User {
  int32 id = 1;
  string name = 2;
}

$ protoc --csharp_out=. --grpc_out=. \
  --plugin=protoc-gen-grpc=grpc_csharp_plugin \
  user.proto

using Acme.Users.V1;
using Grpc.Core;

public sealed class UserServiceImpl : UserService.UserServiceBase
{
    public override Task<User> GetUser(
        GetUserRequest request,
        ServerCallContext context)
    {
        var entity = db.Users.Find(request.Id);

        return Task.FromResult(new User
        {
            Id = entity.Id,
            Name = entity.Name,
        });
    }
}

using Acme.Users.V1;
using Grpc.Net.Client;

using var channel = GrpcChannel.ForAddress("https://localhost:5001");
var client = new UserService.UserServiceClient(channel);

User user = client.GetUser(new GetUserRequest { Id = 42 });

public class UserService
{
    public User GetUser(int id)
    {
        return db.Users.Find(id);
    }
}

using Acme.UserService;

var users = new UserService();

var user = users.GetUser(42);