Material Design In XAML 2.4.0 allows advanced TreeView customisations helping you to bring advanced UI and actions closer to the context for which they are intended.

With the new materialDesign:TreeViewAssist. AdditionalTemplateSelector attached property a node's visual tree can contain can additional content, outside of the standard rippled selection area of the node.

As with XAML, any content can re-rendered for the TreeViewItem or its data context. This easily enables a tree view navigation to be combined with contextual information and interactions, easily visible to the user.