I have a Windows Service which processes some files every X seconds. The service should run 24/7 unless there is an exception, in which case I stop the service. However, there are times when I would want to stop the service manually (through Admin Tools/Services). How do I ensure that when I do that while the function that does the file processing is still executing, the service will wait for the function to finish? Is there anything I can put in OnStop() to detect whether the function is running or not? I suppose I could have the function turn some app settings on when it starts executing and off when it finishes executing, and add some code in OnStop() to check the setting. However, I would have to implement a loop to constantly check for the flag, plus I don't know how long OnStop() can wait?
I would appreciate any suggestions. Thank you.