RadTreeView supports right-click menus for each TreeNode (Context Menus). You can define any number of context menus, assign them a name and then associate any TreeNode with a context menu using the ContextMenuName property.

You can define Context Menus in an XML File in the following format:
<ContextMenus>
   <Menu Name="City">
      <Item Image="iconRestaurants.gif" Text="Restaurants" PostBack="True"/>
      <Item Image="iconHotels.gif" Text="Hotels" PostBack="True"/>
      <Item Image="iconClubs.gif" Text="Clubs" PostBack="True" />
   </Menu>
   <Menu Name="Country">
      <Item Text="Country info" />
      <Item Text="Country economics" />
      <Item Text="Country politics" />
      <Item Text="Country demographics" />
   </Menu>
   <Menu Name="Continent">
      <Item Text="Info on continent" />
      <Item Text="Continent highlights" />
   </Menu>
</ContextMenus>

The you can assign a context menu for a TreeNode using:
<Tree>
   <Node Text="U.S.A" ContextMenuName="Country" />
</Tree>

You can also directly add ContextMenuItems to ContextMenu instances and then add a particular ContextMenu to the ContextMenus ArrayList collection of the control.

Context Menus support both client- and server-side events. You can assign client events for ContextMenuItem clicks using BeforeClientContextClick and AfterClientContextClick.
If you mark a ContextMenuItem with the PostBack="True" property a server event is generated. The event is called OnNodeContextClick and holds the following information: the instance of the node and the text of the context menu that was selected.