Kill / ending threads

that seems to sort the problem, thanks.

There may be an easy solution! Each thread has a property "isBackgroundThread". By default this property is 'false' If you set it to 'true' then the threads will die when the parent thread is killed.

yeah i figured as much, but it's for my dissertation and to get that done virtually requires a total rebuild if it's not going to look to messy. And it has to be in soon, so I think I'll skip that. The guy who's marking it doesn't know C# and won't check that. I think I'll just not tell him. Cheers for your help

All threads die only when the process in which they are running is terminated. Once a thead is created it runs independently of the thread that created it. If you want the dependency you are looking for, then you need to code for it.