private static async Task runObserver()
{
var timer = new Timer();
var clock = new ConsoleClock();
timer.Notify += clock.Update;
timer.Start();
await Task.Delay(4000);
timer.Notify -= clock.Update;
await Task.Delay(2000);
timer.Notify += clock.Update;
}
static void Main()
{
// ADDED FEATURE: Clear the console window.
Console.Clear();
// Save the top and left coordinates.
_top = Console.CursorTop;
_left = Console.CursorLeft;
// Create a Tester object.
Tester t = new Tester();
// Create a ConsoleClock object.
ConsoleClock cc = new ConsoleClock();
// Subscribe to the event in the ConsoleClock.
cc.OnUpdateClock += new UpdateClockHandler (t.TesterUpdateClockHandler);
// Start the timer.
cc.RunTheClock();
// Display this when the program is shutting down.
Console.Write ("\nPress <ENTER> to end: ");
Console.ReadLine();
}