using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Post post = new Post();

        Get get = new Get();

    }

​

    class Post : Client

    {

        public void postMethod()

        {

            Console.WriteLine("postMethod stuff");

        }

    }

    class Get : Client

    {

        public void getMethod()

        {

            Console.WriteLine("getMethod stuff");

        }

    }

    class Client

    {

        public Client() 

        {

            clientMethod();

        }

​

        public void clientMethod() 

        {

            Console.WriteLine("Client method stuff");

        }

    }

}