Enable Forever Frames

[chanan]

Maybe...

[chanan]

https://github.com/SignalR/SignalR/blob/5dd9f39dfeb1ce74fa89255db5a704a0448300a8/src/Microsoft.AspNet.SignalR.Core/Transports/ForeverFrameTransport.cs

[chanan]

ForeverFrames are only used for IE. I will deffer adding this transport for now.