SelectedItem property should not accept RadTreeViewItem objects when is data bound. Reason for decline:
SelectedItem should return business object in databound scenarios. Setting SelectedItem to container with the following code: this.xTree.SelectedItem = this.xTree.ItemContainerGenerator.ContainerFromIndex(0); should resutl in no selection. This is how the ListBox or the TreeView (MS controls work).
What does this mean?