Do not use Microsoft.AspNet.SignalR.Owin any longer

Today I had some strange warnings in one of my web projects using SignalR and Owin. After longer probing and testing, also asking at Stack Overflow, I finally found the reason.

I used the following NuGet packages (beside others):

• Microsoft.AspNet.SignalR.Core: 2.2.0
• Microsoft.AspNet.SignalR.Owin: 1.2.2

Both components contain some classes in the same namespace (e.g. Microsoft.AspNet.SignalR.WebSockets.DefaultWebSocketHandler). Unfortunately, not all implementations (worse: not all signatures) are identical. This caused my problems.

The solution is simple: just do not use the NuGet package Microsoft.AspNet.SignalR.Owin any longer! Microsoft.AspNet.SignalR.Core is enough.