I am working on an Asp.Net MVC 4 Application in which I am using SignalR 2.0.1 and I Mapped it using Owin Startup class and it worked fine at first.
All of a sudden when I tried to rebuild my app it said that the type are namespace
public class Startup
public void Configuration(IAppBuilder app)
Try to use Package Manage Console and do
Update-Package Owin -Reinstall