using System;

​

public interface IConnection

{

    void MakeRequest();

}

​

public class Connection : IConnection

{

    private void DoSomething()

    {

        Console.WriteLine("Connection:DoSomething");

    }

    public void MakeRequest()

    {

        Console.WriteLine("Connection:MakeRequest");

    }

}

​

public class Client

{

    private IConnection _connection = null;

    public Client(IConnection conn)

    {

        conn.MakeRequest();

    }

}

​

public class MainClient

{

    private IConnection _connection = null;

    private Client _client = null;

    public void Connect()

    {

        _connection = new Connection();

        _client = new Client(_connection);

    }

}

​

public class Program

{

    public static void Main()

    {

        MainClient mc = new MainClient();

        mc.Connect();

    }

}