public void IncreaseDuration(TimeSpan increment)
{
TimeRemaining += increment.GetWholeSeconds();
}
/// <summary>
/// Wrap up a Windows forms timer as a Countdown. Provide access to the ticking and the expired event.
/// </summary>
public Countdown(TimeSpan duration)
{
TimeRemaining = duration.GetWholeSeconds();
timer = new Timer { Interval = (int)interval.TotalMilliseconds };
timer.Tick += OnTimerTick;
}
