22 Mar 2016 @ 1:05 PM 

I have been developed using ASP.NET 2.0 using Visual Studio 2010 using VB. Reason why I stick to use ASP.NET 2.0 is because my hosting provider only support ASP.NET version 2.0 and 4.0 and I feel the former is more light and normally come installed in Windows 7.

All the while, I am happy developed in Windows 7 until I upgraded to Windows 10 yesterday. It has turned to disaster that my Ajax controls are no longer working. In the designer, it showed Error Creating Control and the description is pointing to AjaxControlToolkit which may not configured properly.

Error Creating Control - ToolkitScriptManager1
Failed to create designer 'AjaxControlToolkit.ToolkitScriptManager, AjaxControlToolkit, 
Version=1.0.20229.20821, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e'

asp-net-2-0-ajax-control-toolkit-1-0-win-10-visual-studio-2010

I tried to search on the Internet but could not find any solution that worked. I tried to edit my Web.Config file and it didn’t help. I tried to reinstall ASPAJAXExtSetup.msi but the problem is still persist. I tried to switch the target framework to version 3.5 and it is working but this is not what I wanted.

Finally, I found the solution by adding a reference to System.Web.Extensions.Design

project-references-system-web-extensions-design

Hope this article can help those who are facing the same problem as me.

Posted By: Aeric
Last Edit: 22 Mar 2016 @ 01:22 PM

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