public Pizza(Crust crust, Size size, Toppings toppings, string name)
 {
     Crust    = crust;
     Size     = size;
     Toppings = toppings;
     Price    = crust.Price + size.Price + toppings.Price;
     Name     = name;
 }
 public void createPizza(Crust crust, Size size, Toppings toppings, string name)
 {
     pizzas.Add(new Pizza(crust, size, toppings, name));
 }