Get Started with the AJAX Control Toolkit (C#) - Microsoft Learn
: Open an ASP.NET Web Forms ( .aspx ) page in Visual Studio 2015. You should now see an "AJAX Control Toolkit" tab in your Toolbox. download ajax control toolkit for visual studio 2015
The installer is the best choice if you want the AJAX controls to appear automatically in your Visual Studio Toolbox. Get Started with the AJAX Control Toolkit (C#)
: Visit the Official DevExpress AJAX Control Toolkit page and download the .exe setup file. download ajax control toolkit for visual studio 2015