SignalR provides a simple API for creating server-to-client remote procedure calls (RPC) that call JavaScript functions in client browsers (and other client platforms) from server-side .NET code. SignalR also includes API for connection management (for instance, connect and disconnect events), and grouping connections.
so you can have a realtime connection with server through web socket connection, this library were ported from NanoFramework version.
Check this out: GitHub - Gravicode/TinyCLR.SignalR.Client: This is experimental project to test SignalR on TinyCLR
I love TinyCLR and also NanoFramework, so do you have any plan to support NanoFramework in the future ?