Tree is a component that renders a tree control on the page.
The most important tree features are:

- Native support for Ajax operations
- Support for "ajax", "client" and "server" switch types
- Built-in drag/drop capabilities
- Flexible look

Note how the tree switched on "client" does not "remember" its state when whole page is reloaded. At the same time "ajax" tree remembers its state without any additional code.