Alternative to WCF Duplex Communications
I'd like to see an alternative to WCF Duplex Communications.
This is somewhat related to http://servicestack.uservoice.com/forums/176786-feature-requests/suggestions/4458942-add-fast-tcp-endpoint (Add fast TCP endpoint), as the duplex comms should use the same connection.
We use this for "playing nice" with firewalls (make connection out, poll in on same connection).

Server Stream gRPC Services provides the best alternative for establishing a persistent HTTP/2 channel which has a dedicated channel for servers to push data upstream to clients:
https://docs.servicestack.net/grpc#server-stream-grpc-services
-
AVee commented
Wouldn't SignalR integration solve this? See http://servicestack.uservoice.com/forums/176786-feature-requests/suggestions/5698075-deeper-signalr-integration