OWIN test for hosting static files

Program.cs

using System;
using System.Diagnostics;
using Microsoft.Owin.Hosting;
using Microsoft.Owin.FileSystems;
using Microsoft.Owin.StaticFiles;
using Owin;

namespace Test.Owin.StaticFiles
{
    public class Program
    {
        static void Main(string[] args)
        {
            var url = "http://localhost:8080";
            WebApp.Start<Startup>(url);
            Console.WriteLine("Listening at " + url);
            Console.ReadLine();
        }
    }
}

Startup.cs

using Microsoft.Owin;
using Microsoft.Owin.FileSystems;
using Microsoft.Owin.StaticFiles;
using Owin;
using System.IO;
using System.Reflection;
using System;

namespace Test.Owin.StaticFiles
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            var relativePath = string.Format (@"..{0}..{0}", Path.DirectorySeparatorChar);
            string contentPath = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), relativePath);

#if DEBUG
            app.UseErrorPage();
#endif

            app.UseFileServer(new FileServerOptions()
                {
                    RequestPath = PathString.Empty,
                    FileSystem = new PhysicalFileSystem(Path.Combine(contentPath, @"public")),
                });

            app.UseStaticFiles (new StaticFileOptions ()
                {
                    RequestPath = new PathString ("/assets"),
                    FileSystem = new PhysicalFileSystem (Path.Combine(contentPath, @"assets"))
                });
        }
    }
}