using System;

​

interface IAnimal 

{

  void animalSound(); 

}

​

class Dog : IAnimal 

{

  public void animalSound() 

  {

    Console.WriteLine("The Dog says: gheu gheu");

  }

}

​

public class Program 

{

  public static void Main(string[] args) 

  {

    Dog myDog = new Dog(); 

    myDog.animalSound();

  }

}