using System;

public class Program

{

    public static void Main()

    {

        IEngine car = new Car();

        IEngine bus = new Bus();

        car.MakeNoise();

        bus.MakeNoise();

    }

}

​

public class Car : IEngine

{

}

​

public class Bus : IEngine

{

   public void MakeNoise()

   {

        Console.WriteLine("K'chugah");

   }

}

​

public interface IEngine

{

    void MakeNoise()

    {

        Console.WriteLine("Vroom Vroom");

    }

}

​

​