public ActionResult CheckOut()
 {
     Order order = new Order(Guid.NewGuid().ToString(), DateTime.Now, HttpContext.User.Identity.Name);
     foreach(var item in  ShoppingCart.Current.Items)
     {
         order.AddOrderLine(item.ProductId, item.Quantity);
     }
     this.OrdersService.Submit(order);
     ShoppingCart.Current = null;
     return View();
 }