using System;

​

class Student

{

    public void show()

    {

        Console.WriteLine("I am a student");

    }

    public void display()

    {

    Console.WriteLine("I am in Colombo");

    }

}

​

class AlStudent : Student

{

    public void show() //overiding the superclass

    {

        Console.WriteLine("I am doing Advanced Levels.");

    }

}

​

public class Program

{

    public static void Main()

    {

        AlStudent x = new AlStudent();

        x.show();

        x.display();   //inheritance

    }

}