using System;

using System.Collections.Generic;

public class Program

{

    private List<Fruit> fruits = new List<Fruit>();

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

​

abstract class Fruit

{

}

​

class Apple : Fruit

{

    public Apple()

    {

        Console.WriteLine("I am an apple");

    }       

}

​

class Orange : Fruit

{

    public Orange()

    {

        Console.WriteLine("I am an orrange");

    }

}