public ActionResult Edit(CustomerPhone customerphone)
 {
     if (ModelState.IsValid)
     {
         _db.ActivatePhoneNumber(customerphone.CustomerId, customerphone.Id);
         return RedirectToAction("Index");
     }
     return View(customerphone);
 }
        public ActionResult Create(CustomerPhone customerphone)
        {
            if (ModelState.IsValid)
            {
                db.CustomerPhones.Add(customerphone);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(customerphone);
        }