using System;

public class Program

{

    public static void Main()

    {

        Shape circle = new Circle();

        ColorDecorater green = new ColorDecorater("Green", circle);

        ShadeDecorater dash = new ShadeDecorater("Dash", green);

        Console.WriteLine(dash.Draw());

    }

}

​

public abstract class Shape{

    public abstract string Draw();

}

public class Circle : Shape {

    public override string Draw(){

        return "Circle";

    }

}

public abstract class ShapeDecrotar : Shape {

    public Shape shape {set; get;}

    public ShapeDecrotar(Shape shape){

        this.shape = shape;

    }

}

​

public class ColorDecorater: ShapeDecrotar{

    string color {set; get;}

    public ColorDecorater(string color, Shape shape): base(shape) {

        this.color = color;

    }

    public override string Draw(){

        return color + " "  + shape.Draw();

    }   

}

​

public class ShadeDecorater: ShapeDecrotar{

    string shade {set; get;}

    public ShadeDecorater(string shade, Shape shape): base(shape) {

        this.shade = shade;

    }

    public override string Draw(){

        return shade + " "  + shape.Draw();

    }   

}

​

​

​

​