how cancellation token stop continue with?

Question

I have a Thread with this code:

foreach (string file in allDirectoriesFiles)
{
    if (cancellationToken.IsCancellationRequested)
    {
        return;
    }

    // ... some operation...
}

// ... some operation 2...

notice that I use return instead of break, because if I stop the thread the some operation 2 must not be executed.

I also notice that in this manner the .ContinueWith it is not executed.

Well, but that is just a "return" function. How can C# know that I'm returning due to the tokenSource.Cancel() instead of a usual return?

Answer 1

You should not create the continuation with the same cancellation token or else the continuation will also be cancelled, even before it is executed. Create the continuation with a different cancellation token (from a different cancellation source) or simply create it without a cancellation token if you always want the cancellation to execute.

Answer 2

A CancellationToken is meant to propagate the cancelling to the whole set of actions at once. Once you Cancel() its source, the other continuations won't be called.