gRPC and ASP.NET Core: serverside reflection

I've been trying to implement the concepts of serverside reflection described in [https://github.com/grpc/grpc/blob/master/doc/server-reflection.md ] and for C# [https://github.com/grpc/grpc/blob/master/doc/csharp/server_reflection.md ] in the implementation of ASP.NET Core. You have to somehow configure Kestrel to enable Reflection first. I just don't succeed and have to give up. Does somebody know how to enable serverside reflection in ASP.NET Core with Kestrel? Or even better has a complete working example of serverside reflection in C# ASP.NET Core?