using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        //parent p = new parent();

        child c = new child();

    }

}

​

public class parent

{

    public parent()

    {

        Console.WriteLine("parent Constructor");

    }

}

​

public class child : parent

{

    public child()

    {

        Console.WriteLine("child Constructor");

    }

}