Sitefinity provides the ability to use all controls from RadControls for ASP.Net AJAX without purchasing a separate license. This also includes the two controls you mentioned: RadAjaxPanel and RadAjaxManager. For more information on these controls, please look at the online documentation for RadAjax
. For more information on using RadControls in Sitefinity, see RadControls for ASP.Net AJAX
in the Sitefinity Online Developer Manual.
Let us know if you need further assistance.
the Telerik team