SignalR/SignalR — pull request #3185 by halter73 (2014-07-31 23:51:59+00:00)
Title: Prevent MessageBus from hanging forever in the second call to Dispose

It really should be [safe to dispose twice](http://msdn.microsoft.com/en-us/library/system.idisposable.dispose.aspx). [Autofac was even forced to work around this issue](https://code.google.com/p/autofac/wiki/SignalRIntegrationReleaseNotes).

#1088