For micro-api tutorial

Startup.cs

using System.Web.Http;
using Owin;

namespace SelfHosted{
  public class Startup{
    public void Configuration(IAppBuilder app){
      // Configure Web API for self-host.
      var config = new HttpConfiguration();
      config.Routes.MapHttpRoute(
        name: "DefaultApi",
        routeTemplate: "api/{controller}/{name}",
        defaults: new { name = RouteParameter.Optional }
      );

      app.UseWebApi(config);
    }
  }
}