using System;

​

namespace LabExerSix

{

    public class Program

    {

        public static void Main()

        {

            Food nameHamburger = new Food();

            Food Hamburger = new Hamburger();

            nameHamburger.hamburger();

            Hamburger.hamburger();

        }

    }

​

    class Food

    {

        public virtual void hamburger()

        {

            Console.WriteLine(" Hamburger");

        }

    }

​

    class Hamburger : Food

    {

        public override void hamburger()

        {

            Console.WriteLine(" cheese hamburger");

        }

    }

}