public ActionResult Edit(Order order)
        {
            orders.Update(order);
            orders.Commit();

            return RedirectToAction("Index");
        }
        // GET: /Create
        public ActionResult Create()
        {
            var order = new Order();

            // viewBag for DropdownList
            var customer = customers.GetAll();
            ViewBag.Customer = customer.OrderBy(s => s.CustomerName);

            return View(order);
        }
        public ActionResult Create(Order order)
        {
            orders.Insert(order);
            orders.Commit();

            return RedirectToAction("Index");
        }