public ShoppingCartController()
 {
     Cart = new ShoppingBasket { DeliveryAddress = "Highway to hell", IsFinish = false };
     Cart.AddItem(new BasketItem
         {
             ProductId = 2,
             Quantity = 1
         });
 }
 public ShoppingCartController()
 {
     if (Cart == null)
         Cart = new ShoppingBasket();
 }