public OrdersController(OrderServiceGateway orderService, OrderRepository orderRepository)
 {
     _orderService    = orderService;
     _orderRepository = orderRepository;
 }
 public ActionResult Order(int id, int quantity = 1)
 {
     OrderServiceGateway.SendOrder(id, quantity);
     return(RedirectToAction("Details", new { id = id, ordered = true }));
 }