Browse to the AjaxControlToolkit.dll to populate the list with controls like CalendarExtender , Accordion , and ModalPopupExtender . ⚠️ Security & Versioning Note
: 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
Right-click the Toolbox and select (name it "AJAX Toolkit"). Right-click inside the new tab and select Choose Items . Browse to the AjaxControlToolkit
: 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 Avoid third-party "driver download" sites or unofficial mirrors, as these may contain outdated versions or bundled malware. select Manage NuGet Packages
: Right-click your project in Visual Studio, select Manage NuGet Packages , search for "AjaxControlToolkit," and click install.