TreeView
Description
Use TreeViewItem nesting for compact folder, outline, or category hierarchies.

Example usage
<fluence:TreeView>
<fluence:TreeViewItem Header="Workspace" IsExpanded="True">
<fluence:TreeViewItem Header="Pages" />
</fluence:TreeViewItem>
</fluence:TreeView>
State and behavior
Nodes expand and collapse; selection can be single or multiple.