Question

I have a BackgroundWorker that calls a method that calls a method… and somewhere along the line I check for CancellationPending and want to exit the BackgroundWorker.

Is there a way to do that directly from that deeply nested method or does it have to return to its caller, which in turn will return to its caller…?

Answer 1

There is nothing special about the fact that you’re using a BackgroundWorker – think about this in the same terms as you would just dealing with deeply nested method calls.

In other words, no, there’s no (non-horrible) way I can think of to do that directly.

The cleanest way I can think of is to simply check for CancellationPending immediately after you return from each nested method, at every level (and if true, return).

Throwing a specific exception and catching same specific exception type at the top level would get you out quickly but isn’t exactly best practice (which is, don’t use exceptions anything non-exceptional, like normal flow control).