public static void CookVegitable(Vegetable vegitable, Chef chef)
{
Potato potato = new Potato();
bool isCookable = IsCookable(potato);
if (isCookable)
{
chef.Cook(potato);
}
else
{
throw new ArgumentException("The Vegitable be not rotten and peeled!");
}
}
public static void Main()
{
Chef chef = new Chef();
chef.Cook();
}