Why is WaitAll method not supported for threads that have STAThreadAttribute?

Question

This msdn article says:

The WaitAll method is not supported for threads that have STAThreadAttribute.

If one googles or searches for stackoverflow, they will find numerous workarounds.

I would like to know the reason why this is not supported. Of course, this is not arbitrary, and there is a good reason why this may be so. What happens to an STA thread that prevents or makes it difficult to do WaitAllits job?

Can you explain?

Answer 1

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, WaitAll() , WaitOne() verboten.

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WaitAll() , . , .

. WaitOne(), BackgroundWorker.RunWorkerCompleted , TaskScheduler.FromCurrentSynchronizationContext() async.