I have learned some more information on my memory problems. My program appears to work fine for hours on end with memory being allocated, released and collected as expected. But then at some point during operation (when no one is around so the system is not being used) memory stops being released and collected.

I wrote a little routine that used the GC.GetTotalMemory method to record the memory in use every minute. I find spikes and valleys (as expected) most of the time but then after several hours the chart starts looking like stairsteps as memory stays exactly the same for almost an hour then creeps up and stays for an hour then creeps up again.

It occurs to me that if the memory in use during one minute is the same as the memory in use during the last minute I could look at the stack or something to figure out what's in memory and that might give me a clue as to what's not being collected. But I don't know where to begin to do this. I found that I could dim an object as a stack but is that what I want? Anyone got a hint as to how i could do this?

Thanks!