I have run into one behavior that can be problematic.

When binding to a regular TextBox.Text property, the binding doesn’t execute until the TextBox loses focus – indicating that the user has completed their edit.

When binding to the AutoCompleteBox.SelectedItem property, the binding executes as soon as and every time a match is found – before the control loses focus, the signal used by other controls to trigger bindings. In the case of the AutoCompleteBox, a user may hit multiple matches before deciding on their final choice, causing any attached binding logic to execute an unnecessary number of times.

It would be more consistent with the binding behaviors of other similar controls (like DatePicker) to have the binding fire only once the user signals their final choice by moving focus away from the control.

Does this make sense? Is there a place on CodePlex where I should log this as an ‘official’ feature request?

Thanks and keep up the good work!

You ROCK!!!