public Macbook(double price, ShoppingCart.Category.Category category, string title = "Macbook") : base(title, price, category)
{
}
public Iphone(double price, ShoppingCart.Category.Category category, string title = "Iphone") : base(title, price, category)
{
}
public Product(string title, double price, ShoppingCart.Category.Category category)
{
_title = title;
_price = price;
_category = category;
}