will completeAdding to wake up the thread already blocked by take

in the case that the consumer is already blocked by take()开发者_如何学Python , will producer's completeAdding wake it up? using BlockingCollection. MSDN does not state it clearly.

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No.

A quick experiment shows it will throw an InvalidOperation exception in the Take() method.

And that makes sense:

int value = data.Take();

What would value be when the Thread/Task would just 'wake up' without any data to return ?

If you are blocked with TryTake(out x) it will return with false when Adding is completed.

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I'm not very familiar with BlockingCollections, but in general my understanding is that if something is blocked it does not get "woken up" by a third party.