Nancy.cs

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var url = "http://+:8080";

            using (WebApp.Start<Startup>(url))
            {
                Console.WriteLine("Running on {0}", url);
                Console.WriteLine("Press enter to exit");
                Console.ReadLine();
            }
        }
    }

    public class HelloModule : NancyModule
    {
        public HelloModule()
        {
            Get["/", true] = async (x, ct) => await Task.FromResult("hello");
        }
    }

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