using System;

​

namespace ex1

{

    class Bclass

    {

        public virtual int result(int a,int b)

        {

            return a + b;

        }

    }

​

    class Dclass:Bclass

    {

        public override int result(int a, int b)

        {

            return a - b;

        }

        public int BaseResult(int a, int b)

        {

            return base.result(a, b);

        }

}

public class Program

{

​

    public static void Main(string[] args)

    {

        Dclass obj1 = new Dclass();

        Console.WriteLine(obj1.BaseResult(10, 5));

    }

​

}

}