: This is the modern standard for adding the toolkit to Visual Studio projects. You can install it via the Package Manager Console: Install-Package AjaxControlToolkit
: Remember that most toolkit controls require a ScriptManager or ToolkitScriptManager on the page to function correctly. Download Ajax Control Toolkit zip
Browse to the AjaxControlToolkit.dll to populate the list with controls like CalendarExtender , Accordion , and ModalPopupExtender . ⚠️ Security & Versioning Note : This is the modern standard for adding
: 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 . ⚠️ Security & Versioning Note : The full
: 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 Avoid third-party "driver download" sites or unofficial mirrors, as these may contain outdated versions or bundled malware.
: If you download the DLLs manually, right-click References in your project, select Add Reference , and browse to the extracted AjaxControlToolkit.dll .
: Ensure your project targets .NET Framework 4.0 or higher , as recent versions of the toolkit do not support older frameworks.