public bool Change(int dueTime, int period)
{
if (dueTime < -1)
{
throw new ArgumentOutOfRangeException("dueTime");
}
if (period < -1)
{
throw new ArgumentOutOfRangeException("period");
}
if (runner == null)
{
return(false);
}
start_event.Reset();
runner.Abort();
runner.DueTime = dueTime;
runner.Period = period;
start_event.Set();
return(true);
}