using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Enemy Troll = new Enemy();

        Troll.Name = "Cave";

        Troll.jump();

    }

}

public partial class Enemy //Use partial classes to extend classes without messing with the original

    {

    public string Name {get;set;}

    }

​

public partial class Enemy : Jump

{

    public void jump()

        {

            Console.WriteLine(Name + " can Jump!");

        }

}

​

interface Jump

{

    void jump();

}