All,

 I seem to be having a problem with the LargeIntervalTimer class when running on a PPC2003, Intermec 761B, using .net cf 2.0 sp2.  I get the tick events for about two hours but then they stop and do not resume until I wake the device up.  I have the device set to turn off after 3 minutes of idle time.  The timer is executing every minute (for testing five minutes in production).  I am currently running a test on a WM5 device now.

Same problem happens on a Intermec CN3 with WM5.

What interval are you using between ticks?

I was using a 5 minute interval but reduce it to 1 minute for testing.  Both intervals fail.

After some testing it seems it has something to do with my application.  I wrote a console application to test and it ran successfully for 4+ hours.  The only difference is that my test code had a static method for the tick and my application has a class that is instantiated and did not use a static method.

Can someone explain why running the LargeIntervalTimer works as expected when initializing in a main and using a static delegate, but when using a main which instantiates a class that in turn instantiates a LargeIntervalTimer that calls an intstance delegate ceases to respond after about 3 hours?  I am assuming this has something to do with Windows Mobile and its suspend state but would like to hear some concrete reasoning.  All code is part of a class called AutoArriveDepart.  Any response is much appreciated.

 Static Example (Tested for 16 hours):

[MTAThread]
static void Main(String[] args)
{
    Cursor.Current = Cursors.Default;
    LargeIntervalTimer myTimer = new LargeIntervalTimer();
    myTimer.Tick += new EventHandler(myTimer_Tick);
    myTimer.Interval = new TimeSpan(0, 1, 0);
    myTimer.Enabled = true;
    myTimer_Tick(null, null);
    while (true)
    {
        Thread.Sleep(10000);
    }
    logger.Debug("Exiting Main");
}
static void myTimer_Tick(object sender, EventArgs e)
{
    logger.Debug("tick");
    SoundPlayer sp = new SoundPlayer();
    sp.SoundLocation = @"/windows/notify.wav";
    sp.Play();
}

Instance Example (some code removed for brevity.  Fails after 3 hours) :

[MTAThread]
static void Main(String[] args)
{
    aad = new AutoArriveDepart();
    Cursor.Current = Cursors.Default;
    while (aad.keepRunning)
    {
        logger.Debug("Sleeping");
        Thread.Sleep(5000);
        logger.Debug("Awake");
        Application.DoEvents();
        logger.Debug("Finished DoEvents()");
    }
    aad.CloseSystemTrayIcon();
    logger.Debug("Exiting Main");
}

public AutoArriveDepart()
{
    collectionTimer = new LargeIntervalTimer();
    collectionTimer.Interval = new TimeSpan(0, 1, 0);
    collectionTimer.Tick +=new EventHandler(collectionTimer_Tick);

    collectionTimer.Enabled = true; 
}
void collectionTimer_Tick(object sender, EventArgs e)
{
    logger.Debug("tick");
    SoundPlayer sp = new SoundPlayer();
    sp.SoundLocation = @"/windows/notify.wav";
    sp.Play();
}