Mvc前后端显示不同的404错误页

       protected void Application_EndRequest()
        {
            var statusCode = Context.Response.StatusCode;
            var routingData = Context.Request.RequestContext.RouteData;
            if (statusCode == 404 || statusCode == 500)
            {
                Response.Clear();
                var area = routingData.DataTokens["area"];
                if (area!=null&&area.ToString() == "Admin")
                {
                    Response.Redirect("/Admin/Error/Error404");//后端404页面
                }
                else
                {
                    Response.Redirect("/Error/Error404");//前端404页面
                }
            }
        }