AspNetCore.Docs/aspnetcore/grpc/versioning/sample/GreeterServiceV1.cs

using Greet.V1;
using Grpc.Core;
using System.Threading.Tasks;

namespace Services
{
    public class GreeterServiceV1 : Greeter.GreeterBase
    {
        private readonly IGreeter _greeter;
        public GreeterServiceV1(IGreeter greeter)
        {
            _greeter = greeter;
        }

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