// GET: Admin/Categories/Details/5
        public ActionResult Details(long?id)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            CategoryModel category = db.Get(id);

            if (category == null)
            {
                return(HttpNotFound());
            }
            return(View(category));
        }