The workaround is to set String.Empty for TextSearchPath before setting the new value for the DisplayMemberPath

As a workaround the Foreground property of the AutoCompleteBox can be set to Black.

If the control is placed inside ScrollViewer when the mouse is over the AutoCompelteBox control the mouse wheel is handled leading to no scrolling of the ScrollViewer.

Make it possible to override the functionality of keystrokes in the control. A useful case is when placing the control inside RadGridView's CellEditTemplate and wanting to leave cell editing mode by pressing the escape keyboard key.

1. RadAutoCompleteBox with an ObservableCollection set to its ItemsSource

2. The ObservableCollection is populated on the server side once the SearchText of the control changes.

3. The drop down part of the control closes itself even If there are filtered items.