private void TimerCallback(object state)
{
CancellationTokenSource cts;
lock (_locker)
{
// Timer will not cancel the work item queued before the timer is stopped.
// We don't want to handle the callback after a timer is stopped.
if (!Enabled)
{
return;
}
cts = _cts;
}
try
{
// in try block because "cts.Token" can throw ObjectDisposedException
Elapsed.Raise(this, cts.Token);
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
lock (_locker)
{
if (cts.IsCancellationRequested)
{
cts.Dispose();
}
if (!Enabled)
{
return;
}
if (AutoResetMode == TimerAutoResetMode.Relative)
{
_timer.Change(Interval, Timeout.InfiniteTimeSpan);
}
}
}