TreeView allows end-users to select nodes via mouse clicks. Only single node selection is supported. The selected node is highlighted to be visually differentiated from other nodes.
The selection feature's availability is controlled by the TreeViewSettings.AllowSelectNode property.
You can customize the selected node appearance via the TreeViewSettings.Styles.Node.SelectedStyle property.
TreeView allows the node, whose navigation location points to the currently browsed web page, to be automatically selected if the TreeViewSettings.SyncSelectionMode property is set to true.