using System;

​

namespace ProgramCall

{

    public class Shape

    {

​

        protected float R, L, B;

        public virtual float Area()

        {

​

            return 3.14F * R * R;

        }

​

        public virtual float Circumference()

        {

            return 2 * 3.14F * R;

        }

​

    }

​

  public class Rectangle : Shape

    {

        public void GetLB()

        {

            Console.Write("Enter  Length  :  ");

​

            L = float.Parse(Console.ReadLine()); 

​

            Console.Write("Enter Breadth : ");

            B = float.Parse(Console.ReadLine());

        }

        public override float Area()

        {

​

            return L * B;

        }

​

        public override float Circumference()

        {

            return 2 * (L + B);

        }

    }

​

  public class Circle : Shape

    {

        public void GetRadius()

        {

            Console.Write("Enter  Radius  :  ");

​

            R = float.Parse(Console.ReadLine());

        }

    }

​

   public class MainClass

    {

        static void Main()

        {

​

            Rectangle R = new Rectangle();

            R.GetLB();

​

            Console.WriteLine("Area : {0}", R.Area()); 

​

            Console.WriteLine("Circumference : {0}", R.Circumference());

​

            Console.WriteLine();

​

            Circle C = new Circle(); 

            C.GetRadius();

​

            Console.WriteLine("Area : {0}", C.Area());

            Console.WriteLine("Circumference : {0}", C.Circumference());

​

            Console.Read();

        }

    }

}