Owin Startup Detection

Question

I developed an application with Owin Startup class. When i am running the OwinHost.exe, it shows No Assembly found containing OwinStartupAttribute.

But

Answer 1

Project-> right click add new item.

Startup.cs

using Microsoft.Owin;
using Owin;

[assembly: OwinStartup(typeof(SignalRChat.Startup))]
namespace SignalRChat
{

    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            app.MapSignalR();
        }
    }
}