static void Main(string[] args)
{
Subject subject = new Subject(5);
// Observer1 takes a subscription to the store
var observer1 = new Observar("Observer 1");
subject.Subscribe(observer1);
// Observer2 also subscribes to the store
subject.Subscribe(new Observar("Observer 2"));
subject.Data++;
// Observer1 unsubscribes and Observer3 subscribes to notifications.
subject.Unsubscribe(observer1);
subject.Subscribe(new Observar("Observer 3"));
subject.Data++;
Console.ReadLine();
}
