With RadTreeView you can customize the look and feel of each single TreeNode.
The TreeNodes expose the following properties that can be used to apply certain
CSS classes to the nodes:
CssClass
DisabledCssClass
HoveredCssClass
SelectedCssClass
Each of the above properties determines the CSS class to be applied to the TreeNode
when it is in the respective mode (normal, disabled, hovered and selected).
This example shows how to use the CssClass properties of the nodes
to make them look unique.