using System;

​

​

public class bigclass

{

​

public void taskmsg()

{

​

    Console.WriteLine("taskmsg --- bigclass");

​

}

    public virtual void task()

    {

        Console.WriteLine("task --- bigclass");

    }

}

​

public class smallclass : bigclass

{

    public new void taskmsg()

    {

    Console.WriteLine("taskmsg ---- smallclass");

    }

    public void taskmsg(int a)

    {

        Console.WriteLine("taskmsg ---{0}-- smallclass",a);

    }

    public override void task()

    {

        Console.WriteLine("task ---- smallclass");

    }

    public void _basemethod()

    {

    base.taskmsg();

        base.task();

    }

    public static void Main()

    {

        smallclass sc = new smallclass();

        sc.taskmsg();

        sc.taskmsg(0);

        sc.task();

        Console.WriteLine("");

        Console.WriteLine("-----calling parent class method from child class using base keyword-------------------------------------------------------------");

        Console.WriteLine("");

        sc._basemethod();

        Console.WriteLine("");

        Console.WriteLine("-----parent class reference cannot access pure child class members (method hiding by new keyword)--------------------------------");

                          Console.WriteLine("");

        Console.WriteLine("-----but can access overridden methods as child requires permision from parent---------------------------------------------------");

        Console.WriteLine("");

        Console.WriteLine("-----method hiding/ method overloading child class dont need pemission of parent class-------------------------------------------");

        Console.WriteLine("");

        Console.WriteLine("-----method overloading has multiple methods with same name and different parameters || it has multiple behaviour----------------");

        Console.WriteLine("");

        Console.WriteLine("-----method overriding has multiple methods with same name and same parametrs || in this there is change in behaviour------------");     

        Console.WriteLine("");

        bigclass bc = sc;

        bc.task();

        bc.taskmsg();

​

​

    }

}