Question

How do I handle data returned from a worker thread public method?

Thanks.

Answer 1

If the worker thread is a Task<TResult>, then you can retrieve the result from the Task<TResult>.Result property.

If the worker thread is a BackgroundWorker, then you can retrieve the result from the
RunWorkerCompletedEventArgs.Result property in the argument object passed to BackgroundWorker.RunWorkerCompleted.

If the worker thread is a ThreadPool thread executed via Delegate.BeginInvoke, then you can retrieve the result by calling EndInvoke, even if the delegate has already completed.

If the worker thread is a Thread, or a ThreadPool thread executed via ThreadPool.QueueUserWorkItem, then you must “return” the result by setting a subobject of a parameter, by using a lambda-bound variable, or by using a global variable.