using System;

​

public class Program

{

    public static void Main()

    {

        // after pattern

        NotificationService service = new NotificationService();

        service.Send("eh up", "");

        // before the pattern is applied

        var server = new NotificationServer();

        var conn = server.Connect("MYIP");

        var token = server.Authenticate("APPID", "APPKEY");

        var message = new Message("eh up");

        server.Send(token, message, "ATARGET");

        conn.Disconnect();

    }

}

​

public class NotificationService

{

    public void Send(string message, string target)

    {

        var server = new NotificationServer();

        var conn = server.Connect("MYIP");

        var token = server.Authenticate("APPID", "APPKEY");

        server.Send(token, new Message(message), target);

        conn.Disconnect();

    }

}

​

// before the pattern is applied

public class NotificationServer

{

    public Connection Connect(string ipAddress)

    {

        return new Connection();

    }

​

    public AuthToken Authenticate(string appID, string key)

    {

        return new AuthToken();

    }

​

    public void Send(AuthToken token, Message message, string target)

    {

        Console.WriteLine("Sending a message");

    }

}

​

public class Connection

{

    public void Connect()

    {

    }

​

    public void Disconnect()

    {

    }

}

​

public class AuthToken

{

}

​

public class Message

{

    private string _content;

    public Message(string content)

    {

        _content = content;

    }

}