using System;

public class Animal

{

    public void Animalsound()

    {

        Console.WriteLine("the animal makes sound");

    }

}

 public class dog:Animal

 {

 public void Animalsound()

 {Console.WriteLine("the dog says:Bow Bow");

 }

 }

  public class cat:Animal

 {

 public void Animalsound()

 {Console.WriteLine("the cat says:meow meow");

 }

 }

 class testpolymorphism

 {

      public static void Main(string[]args)

    {

        Animal myanimal=new Animal();

          dog mydog=new dog();

          cat mycat=new cat();

          myanimal.Animalsound();

          mydog.Animalsound();

          mycat.Animalsound();

    }

}