// ITimerService
public ITimerInterval SubscribeInterval(TimeSpan interval, Action <ITimerService, ITimerInterval> callback, IActivitySchedule schedule)
{
TimerInterval result = new TimerInterval(this, interval, callback, schedule);
_intervals = _intervals.Add(result);
return(result);
}
// Internals for ITimerInterval, ITimerSlot
internal void UnsubscribeInterval(TimerInterval timerInterval)
{
_intervals = _intervals.Remove(timerInterval);
}