ListBox.SelectionMode Property
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Gets or sets the selection behavior for the ListBox control.
Assembly: System.Windows (in System.Windows.dll)
XMLNS for XAML: Not mapped to an xmlns.
Use the SelectionMode property to specify whether the user can select multiple items and how the user can select the multiple items. Setting SelectionMode to Multiple allows the user to select multiple items. Setting SelectionMode to Extended allows the user to select multiple items by pressing a modifier key, such as CTRL or SHIFT.