Hi suneetha inturi,
Thank you for your questions. You can add RadTreeView in a RadToolStripItem by using RadHostItem. Please, consider the following code:
Also you can nest any controls including RadTreeView in a RadMenu by using its RadMenuContentItem. Please find more
detailed information and
tutorial in our documentation.
Write me back if you have other questions.
Kind regards,
Martin Vasilev
the Telerik team