static void Main(string[] args)
{
Console.WriteLine($"Creating a new ColorObserver with {Color.Blue} color.");
ColorObserver ObserverBlue = new ColorObserver(Color.Blue);
Console.WriteLine($"Creating a new ColorObserver with {Color.Green} color.");
ColorObserver ObserverGreen = new ColorObserver(Color.Green);
ColorSubject subject = new ColorSubject();
subject.Attach(ObserverBlue);
subject.Attach(ObserverGreen);
subject.ChangeColor(Color.Red);
}
static void Main(string[] args)
{
Console.WriteLine("OBSERVER DESIGN PATTERN\n");
Console.WriteLine("----------");
IObserver headerstyle = new HeaderColor();
IObserver footerstyle = new FooterColor();
ColorSubject colorNotifier = new ColorSubject();
colorNotifier.Register(headerstyle);
colorNotifier.Register(footerstyle);
colorNotifier.Color = "red";
Console.WriteLine("----------");
colorNotifier.Color = "yellow";
}
