public void RemoveTopping(string topName)
{
Topping topping = null;
foreach (Topping top in Toppings)
{
if (top.TopName == topName)
{
topping = top;
break;
}
}
Toppings.Remove(topping);
}
public void AddTopping(Topping topping)
{
Toppings.Add(topping);
}