Startup.cs from SignalR tutorial at http://www.antoinedahan.com/blog/SignalRAzureTutorial/

Startup.cs

using System;
using System.Threading.Tasks;
using Microsoft.Owin;
using Owin;

[assembly: OwinStartup(typeof(SignalRExample.Startup))]

namespace SignalRExample
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            // Will will initiate a mapping from the jquery methods on the page 
            // to the C# functions within each Hub
            app.MapSignalR();
        }
    }
}