DesignPattern_Structural_Decorator

void Main()
{
    Component c1 = new Component();
    Decorator da = new DecoratorA();
    da.Decorate(c1);
    Decorator db = new DecoratorB();
    db.Decorate(da);
    db.Show();
}

class Component{
    public virtual void Show(){}
}
abstract class Decorator:Component
{
    protected Component component;
    public void Decorate(Component c){component=c;}
}
class DecoratorA:Decorator{
    public override void Show(){
        component.Show();        
    }
}
class DecoratorB:Decorator{
    public override void Show(){
        component.Show();        
    }
}