using System;

namespace InheritanceDemo

{ 

    class Shape

    {

        public void setWidth(int w)

        { 

            width = w;

        }

        public void setHeight(int h)

        { 

            height = h;

        }

        protected int width;

        protected int height;

    }

    class Rectangle : Shape

    {

    public int getArea()

    {

     return (width*height);

     }

     }

public class Program

{

    public static void Main(string[] args)

    {

        Rectangle Rect= new Rectangle ();

        Rect.setWidth(5);

        Rect.setHeight(7);

        Console.WriteLine("total area:{0}",Rect.getArea());

    }

}

}