Resposta - Exercício 4

Interface INotifiable:

namespace exercise76.Models;

internal interface INotifiable
{
    public void SendNotification(string notification);
}

Classe Email:

namespace exercise76.Models;

internal class Email : INotifiable
{
    public void SendNotification(string notification)
    {
        Console.WriteLine($"Notification \"{notification}\" sent by email.");
        return;
    }
}

Classe Sms:

namespace exercise76.Models;

internal class Sms : INotifiable
{
    public void SendNotification(string notification)
    {
        Console.WriteLine($"Notification \"{notification}\" sent by sms.");
        return;
    }
}

Instâncias:

using exercise76.Models;

Email email = new Email();
email.SendNotification("testing email notification");

Sms sms = new Sms();
sms.SendNotification("testing SMS notifications");