using System;

public class Program

{

    public static void Main()

    {

        Shape a = new Shape("green");

        a.Display();

        circle b =new circle(7,"blue");

        b.Display();

        Rectangle c = new Rectangle(7,5,"purple");

        c.Display();

    }

}

public class Shape

{

    private string color;

    public Shape()

    {

        color="red";

    }

    public Shape(string c)

    {

        color=c;

    }

     public string Color   // property

  {

    get { return color; }   // get method

    set {color = value; }  // set method

  }

    public void Display()

    {

        Console.WriteLine("this is a shape");

    }

}

internal class circle :Shape

{

int radius=0;

public circle(int radius, String color) : base(color)

{

this.radius=radius;

}

public void Display()

{

Console.WriteLine("This is a circle with a radof "+radius+" from the shaqpe class");

}

}

internal class Rectangle :Shape

{

int length=0;

int width=0;

public Rectangle(int length, int width, string color) : base(color)

{

this.length=length;

this.width=width;

}

public void Display()

{

Console.WriteLine("This is a rectangle with Length"+length+" and width"+width+" from theshpaeclass");

}

}