using System;

public class Program

{

    public static void Main()

    {   

        Inhertence2 ObjInh = new Inhertence2();

        Console.WriteLine("Addition : "+ObjInh.Inhmethod1());       

        Console.WriteLine("Sub : "+ObjInh.Inhmethod2());

    }

}

​

public class Inhertence1

{

    public int a  = 12;

    public int b  = 2;

    public int ad;  

    public int Inhmethod1()

    {

        ad = a+b;

        return(ad);

    }

}

​

public class Inhertence2 : Inhertence1

{

    public int Inhmethod2()

    {

        return(ad+a-b);

    }

}