+1 for gRPC for .NET. Its quite nice _except_ on macos. I forget the exact issue but there's some extra friction to hosting https locally on macos that makes the dev flow a lot more cumbersome.
The lack of server ALPN support on macOS is probably the extra friction you're referring to. This made accepting HTTP/2 connections with TLS impossible. Fortunately, support will be added in .NET 8 with https://github.com/dotnet/runtime/pull/79434.
