ASP.NET Web API extending DefaultDirectRouteProvider

I am trying to create CustomerDefaultDirectRouteProvider

one that extends DefaultDirectRouteProvider

in Web API 2.2 like in this example . However, when I implement the method GetActionRouteFactories(HttpActionDescriptor actionDescriptor)

, I get the error "No matching method found to override".

I can override GetActionRouteFactories(ActionDescriptor actionDescriptor)

, but the class ActionDescriptor

has no method GetCustomAttributes<IDirectRouteFactory>

.

I am importing the following namespaces:

using System.Collections.Generic;
using System.Web.Mvc;
using System.Web.Mvc.Routing;
using System.Web.Routing;
using System.Web.Http.Controllers;

      

        
        
        
      

    

I missed some, maybe?