ASP MVC ActionFilter to simulate NotFound result

NotFoundAttribute.cs

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

namespace MyWebProject.Common
{
    public class NotFoundAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            throw new HttpException(404, "Requested page not found");
        }
    }
}