using System;

public class Program

{

    //VIEW

​

    public interface IView

    {

        void QuandoModeloGritarEuAviso(string mensagem);

    }

    public class Form : IView

    {

        private readonly Controller _controller;

​

        public Form()

        {

            _controller = new Controller(this);

        }

​

        public void OnClick()

        {

            _controller.FazModeloGritar();

        }

        public void QuandoModeloGritarEuAviso(string mensagem)

        {

            Console.WriteLine($@"Modelo mudou {mensagem}");

        }

    }

    // CONTROLLER

    public class Controller

    {

        private readonly IView _view;

        private readonly Model _model;

​

        public Controller(IView view)

        {

            _view = view;

            _model = new Model();

        }

​

        public void FazModeloGritar()

        {

            var grito = _model.Gritar();

            _view.QuandoModeloGritarEuAviso(grito);

        }

    }

    // MODEL

    public class Model

    {

        public string Gritar()

        {

            return "AAAAAAAAAH";

        }

    }

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}