static void Main(string[] args)
{
var videoData = new VideoData();
_ = new EmailNotifier(videoData);
_ = new PhoneNotifier(videoData);
var youtubeNotifier = new YoutubeNotifier(videoData);
videoData.SetTitle("Observer Design Pattern");
videoData.DetachObserver(youtubeNotifier);
Console.WriteLine("-------------------------------");
videoData.SetDescription("Ongdev's video");
_ = new FacebookNotifier(videoData);
Console.WriteLine("-------------------------------");
videoData.SetFileName("A very good tutorial");
Console.ReadKey();
}
public VideoData()
{
_emailNotifier = new EmailNotifier();
_phoneNotifier = new PhoneNotifier();
_youtubeNotifier = new YoutubeNotifier();
}
