public ActionResult AddDeliveryMethod(DeliveryMethod deliveryMethod)
        {
            if (ModelState.IsValid)
            {
                repository.Add(deliveryMethod);
                return RedirectToAction("Index");
            }

            return View(deliveryMethod);
        }
 public ActionResult AddDeliveryMethod()
 {
     DeliveryMethod deliveryMethod = new DeliveryMethod();
     return View(deliveryMethod);
 }