Access Paragraph created in non-UI thread?

[tr00don]

The main class initializes a List<Paragraph> object. New paragraphs are created in a new Task and added to the list of paragraphs. Upon Task completion the paragraph list is scanned in order to append the individual paragrahs to a RichTextBox. However, I get "The calling thread cannot access this object because a different thread owns it" and I suppose it means that paragraphs created in a non-UI thread cannot be access in the UI thread.

Anyone know a workaround for this? Thanks.

[BigEd781]

You communicate between threads by the use of delegates. You can pass a method to your non-UI thread that can be executed on the UI thread periodically or when the task is complete. If you use a BackgroundWorker it is even easier; just handle the DoWork event (and a couple others).

[tr00don]

Is there a limit to the number of BeginInvoke() calls that the main thread Dispatcher can enqueue for later processing? Thanks.