using System;

​

public class Program

{

    public static void Main()

    {

        Base B = new Base();

        B.print();

        Derived D = new Derived();

        D.print();

        Base BB = new Derived();

        BB.print();

        //not allowed as with derived object if you want ot call a base class method which is not overriddein in derived

        //Derived DD = new Base();

    }

}

​

public class Base

{

    public virtual void print()

    {

        Console.WriteLine("Inside Base");

    }

}

​

​

public class Derived:Base

{

    public override void print()

    {

        Console.WriteLine("Inside Derived");

    }

}