Detecting that a ThreadPool WorkItem has completed/waiting for completion

Question

For whatever reason, ThreadPool\'s QueueWorkItem doesn\'t return an IAsyncResult or some other handle to the work item, which would al

Answer 1

Well, you've got a race condition between fetching the WaitHandle and setting it. Do you really want the caller to be waiting forever if they happen to be a tiny bit late?

You should probably do some appropriate locking and keep an "I've finished" flag so that if you do create the WaitHandle after it's finished, you set it before returning it.

I'd also personally write a static factory method rather than just using a public constructor - or make it a "create and then explicitly start" pattern. Queuing the work item in the constructor feels weird to me.

Answer 2

Why aren't you using an asynchronous delegate, as demostrated here:

http://msdn.microsoft.com/en-us/library/h80ttd5f.aspx

That would make Concurrent obsolete, no?