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.
Hi, Declined: This is not considered as an issue with the control. The recommended approach when changing the ItemsSource at run time is to always create and assign new collection instead of modifying the existing one. Regards, Kalin