using System;

​

public class Program

{

    public static void Main()

    {

        Client client = new Client(new Service());

        client.Start();

    }

}

​

public interface IService

{

    void Serve();

}

​

public class Service : IService

{

    public void Serve()

    {

        Console.WriteLine("Service Called");

        //To Do: Some Stuff

    }

}

​

public class Client

{

    private readonly IService _service;

    public Client(IService service)

    {

        this._service = service;

    }

    public void Start()

    {

        Console.WriteLine("Service Started");

        this._service.Serve();

        //To Do: Some Stuff

    }

}

​

​