ThreadPool Class on MSDN. (for .NET 2.0)

Notes:

* one thread monitors the status of several operations queued to the thread pool

* all threads are background threads => will not keep the application running

* add items not related to a wait operation using QueueUserWorkItem. There is no way to cancel a work item after it has been queued.

* 250 threads and 1000 I/O completion threads / available processor

* there is a minimum number of idle threads = number of processors. They are checked/created at a 0.5 sec interval

Example # 1 (www.java2s.com/Code/CSharp/Thread/ThreadPoolSample.htm)

Note: no sleep time causes all the threads to run until they are finished, then switch to the next one.