PanelBar for ASP.NET AJAX Version Q3 2008 released 11/25/2008 (release history)

There are two ways to create a scrollable panelbar child group.

1. Set the ChildGroupHeight property of the parent item. If the child items' height exceeds the available space, a scrollbar appears.
2. Set the RadPanelBar's ExpandMode to FullExpandedItem, so that the child groups stretch to the full panelbar height. If the child items' height exceeds the available space, a scrollbar appears.