for some special textboxes I need to prevent the UpdateSourceTrigger.PropertyChanged (SL5) / UpdateSource() (SL4). Out of the box CM doesn't provide a way to do this. While it is possible to customize/intercept ApplyUpdateSourceTrigger in ConventionManager
and check for a custom attached property e.g. UpdateSource="false" on the element/textbox, there is no easy way to do this for BindParameter in Parser which is used on Message.Attach. Too bad!
Is it possible to introduce a mechanism to prevent the automatic source update on certain elements? E.g. via an attached property like mentioned above?