public class PizzaStore
{
    public Pizza orderPizza(string type)
    {
        Pizza creatablePizza = createPizza(type);
        creatablePizza.prepare();
        creatablePizza.bake();
        creatablePizza.cut();
        creatablePizza.box();
        return creatablePizza;
    }

    public Pizza createPizza(string type)
    {
        Pizza pizza = null;
        if (type == "cheese")
        {
            pizza = new CheesePizza();
        }
        else if (type == "pepperoni")
        {
            pizza = new PepperoniPizza();
        }
        else if (type == "clam")
        {
            pizza = new ClamPizza();
        }
        else if (type == "veggie")
        {
            pizza = new VeggiePizza();
        }

        return pizza;
    }
}

public class PizzaDecorator : Pizza
{
    protected Pizza pizza;

    public PizzaDecorator(Pizza pizza)
    {
        this.pizza = pizza;
    }

    public override void prepare()
    {
        pizza.prepare();
    }
}

public class CheeseAroundPizza : PizzaDecorator
{
    public CheeseAroundPizza(Pizza pizza) : base(pizza)
    {
        Name = pizza.Name + "with cheese Around";
        Cost = pizza.Cost + 5;
    }
}