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";
}
private void SetCommonProperties(Form form)
{
form.Left = nextLeft;
form.Top = nextTop;
form.StartPosition = FormStartPosition.Manual;
(form as IObserver).ColorChanged(_subject.Color);
form.Show();
_subject.Register(form as IObserver);
nextTop += form.Height;
}