using System;

public class Program

{

    public static void Main()

    {

        Parent f = new Parent();

        f.M();

​

        Parent b = new Child();

        b.M();  

        Child c = new Child();

        c.M();  

    }

}

​

class Parent

{

    public void M()

    {

        Console.WriteLine("Parent");

    }

}

​

class Child : Parent

{

    public new void M()

    {

        Console.WriteLine("Child");

    }

}