DesignPatterns/BehaviorPattern/ObserverPattern/Boss.cs at main · WeihanLi/DesignPatterns · GitHub

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namespace ObserverPattern;

internal class Boss : ISubject
{
    private readonly IList<Observer> _observers = new List<Observer>();

    public void Attach(Observer observer)
    {
        _observers.Add(observer);
    }

    public void Detach(Observer observer)
    {
        _observers.Remove(observer);
    }

    public void Notify()
    {
        foreach (var observer in _observers)
        {
            observer.Update();
        }
    }

    public string SubjectState { get; set; }
}

internal class NewBoss : ISubject
{
    public event Action Update;

    public void Notify()
    {
        Update?.Invoke();
    }

    public string SubjectState { get; set; }
}