public ActionResult Creat(GroupCustomer customerGroup)
 {
     if (ModelState.IsValid)
     {
         dbContext.GroupCustomers.Add(customerGroup);
         dbContext.SaveChanges();
         int index = 0;
         index = dbContext.GroupCustomers.OrderBy(x => x.Name).ToList().IndexOf(customerGroup);
         return Json(index, JsonRequestBehavior.AllowGet);
     }
     return new HttpStatusCodeResult(400, "Custom Error Message 2");
 }
 public ActionResult UpdateCustomerGroup(GroupCustomer customerGroup)
 {
     if (ModelState.IsValid)
     {
         dbContext.Entry(customerGroup).State = EntityState.Modified;
         dbContext.SaveChanges();
         return null;
     }
     else
     {
         return new HttpStatusCodeResult(400, "Custom Error Message 2");
     }
 }