private decimal CalculateItemDiscount(Product product, CartItem item)
 {
     return(Promotions.Keys.Contains(product.Id)
         ? Promotions[product.Id].CalculateDiscount(product, item.Quantity)
         : 0);
 }
Exemple #2
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 public void AddItem(CartItem item)
 {
     Items.Add(item);
 }