BookManagement.Controllers.BookController.AllCategories C# (CSharp) Method

        public ActionResult AllCategories()
        {
            var cate = new List<Category>();
            var quer = from i in db.Categorys
                       orderby i.Name
                       select i;
            cate.AddRange(quer.Distinct());
            ViewBag.ListType = new SelectList(cate);

            var serializer = new JavaScriptSerializer();
            var serializedResult = serializer.Serialize(quer);
            return Json(serializedResult, JsonRequestBehavior.AllowGet);
        }