Download Ajax Control Toolkit Zip -

Browse to the AjaxControlToolkit.dll to populate the list with controls like CalendarExtender , Accordion , and ModalPopupExtender . ⚠️ Security & Versioning Note

: Since 2014, DevExpress has maintained the toolkit. You can find installer versions and documentation on the DevExpress AJAX Control Toolkit page. 🛠 Installation & Setup Download Ajax Control Toolkit zip

: If you download the DLLs manually, right-click References in your project, select Add Reference , and browse to the extracted AjaxControlToolkit.dll . Browse to the AjaxControlToolkit