User1535942433 posted
Hi jagjit saini,
About installing the ajax control toolkit,you could do like this:
1.Download and Copy the AJAX Control Toolkit DLL
2.Add a New Tab in ToolBox
3. Set a suitable name for the Tab
4. Choose Items for the ToolBox
More details,you could refer to below article:
https://www.aspsnippets.com/Articles/Install-AJAX-Control-Toolkit-in-Visual-Studio-ToolBox.aspx
You could try to install low-level version.
Best regards,
Yijing Sun