using System;

​

public class Program

{

    public static void Main()

    {

        dynamic p = new ColorPoint();

        p.print();

        p.ColorMe();

        p = new Point(1, 2);

        p.print();

        p.ColorMe();

    }

}

​

public class Point

{

    protected int x, y;

    public Point()

    {

    }

​

    public Point(int x, int y)

    {

        this.x = x;

        this.y = y;

    }

​

    public void print()

    {

        Console.WriteLine("Point, x: {0}, y: {1}", x, y);

    }

}

​

public class ColorPoint : Point

{

    protected int color;

    public ColorPoint(): base ()

    {

    }

​

    public ColorPoint(int x, int y, int color): base (x, y)

    {

        this.color = color;

    }

​

    new public void print()

    {

        Console.WriteLine("ColorPoint, x: {0}, y: {1}, c: {2}", x, y, color);

    }

​

    public void ColorMe()

    {

        Console.WriteLine("I'm colored!");

    }

}