找不到返回404错误的路线，该如何解决

Question

我一直在尝试访问404的“ localhost / CompanyRegistration / Index” 到目前为止，已返回错误。.伙计们，我在做什么错了？？

这是我的RouteConfig.cs

 using System.Web.Mvc;
 using System.Web.Routing;
 namespace Supply_Manager
 {
   public class RouteConfig
   {
      public static void RegisterRoutes(RouteCollection routes)
      {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        routes.MapRoute(
           "Default",
           "{controller}/{action}",
           new { controller = "Home", action = "Index" }
        );

        routes.MapRoute(
           "CompanyRegistration",
           "{controller}/{action}",
            defaults: new { controller = "CompanyRegistration", action = "Index"}
        );  
      }
   }
 }

这是WebApiConfig.cs

using System.Web.Http;
namespace Supply_Manager
{
   public static class WebApiConfig
   {
      public static void Register(HttpConfiguration config)
      {
         config.MapHttpAttributeRoutes();
      }
   }
}

这是Global.asax.cs

using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.Http;
namespace Supply_Manager
{
  public class Global : HttpApplication
  {
      protected void Application_Start()
      {
        AreaRegistration.RegisterAllAreas();
        GlobalConfiguration.Configure(WebApiConfig.Register);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
      }
  }
}

这是CompanyRegistrationController

 using System;
 using System.Linq;
 using System.Web;
 using System.Web.Mvc;

 namespace Supply_Manager.Controllers
 {
    [AllowCrossSiteOrigins]
    public class CompanyRegistrationController : Controller
    {
      [HttpPost]
    public ActionResult Index()
    {
       Console.WriteLine("url working ....")
    }
  }
}

我所有的Controllers都在Controller文件夹中 ConmpanyRegistration Controller文件名为“ CompanyRegistrationController.cs”，但仍无法正常工作，如何解决此问题