https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.msgpackprotocoldependencyinjectionextensions.addmessagepackprotocol?view=aspnetcore-2.1&viewFallbackFrom=aspnetcore-2.2
MsgPackProtocolDependencyInjectionExtensions.AddMessagePackProtocol Method...
Enables the MsgPack protocol for SignalR.
method