: The full source code and latest releases are available on the official GitHub page . You can download the source as a .zip file by clicking the Code button and selecting Download ZIP .
: Ensure your project targets .NET Framework 4.0 or higher , as recent versions of the toolkit do not support older frameworks. Download Ajax Control Toolkit zip
: To see the controls in your Visual Studio Toolbox: : The full source code and latest releases
Browse to the AjaxControlToolkit.dll to populate the list with controls like CalendarExtender , Accordion , and ModalPopupExtender . ⚠️ Security & Versioning Note Download Ajax Control Toolkit zip
: Only download the toolkit from GitHub , NuGet , or DevExpress . Avoid third-party "driver download" sites or unofficial mirrors, as these may contain outdated versions or bundled malware.