public void Subscribe(Countdown countdown)
{
countdown.CountdownComplete += (c, countdownInfo) =>
{
var timeInSeconds = countdownInfo.TimeInSeconds;
var message = countdownInfo.Message;
System.Console.WriteLine("Countdown completed in {0} seconds: '{1}'", timeInSeconds, message);
};
}
static void Main(string[] args)
{
Countdown countdown = new Countdown(10, "Hello, world!");
CountdownDisplay countdownDisplay = new CountdownDisplay();
countdownDisplay.Subscribe(countdown);
CountdownDisplay countdownDisplay2 = new CountdownDisplay();
countdownDisplay2.Subscribe(countdown);
countdown.Start();
}