Get or sets a collection of items (suggestions) displayed within the editor's dropdown. This is a dependency property.
An object that represents the data source from which the AutoSuggestEdit retrieves a list of suggestions.
The AutoSuggestEdit editor does not iterate the source itself. The assigned item collection is passed to the editor's drop down.
The control in the editor's popup processes the ItemsSource collection. You can get this control by using the PopupElement property.