ASP.Net MVC 3重定向UnAuthorized用户不登录loginUrl

 <authentication mode="Forms">
   <forms loginUrl="~/Account/Login" timeout="2880" />
  </authentication>
 <authorization>
    <deny users="?" />
  </authorization>
</system.web>

public class CustomAuthorizeAttribute : AuthorizeAttribute
{
    protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)
    {
        if (!filterContext.HttpContext.User.Identity.IsAuthenticated)
        {
            base.HandleUnauthorizedRequest(filterContext);
        }
        else
        {
            filterContext.Result = new RedirectResult("~/Error/Unauthorized");
        }
    }
}

[CustomAuthorize]
public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }
}