I have decided to upgrade my Visual Studio 2012 Express to VS 2022 . Now my development website doesn't work. I'm getting an error that I believe deals with the AjaxToolbox (from what I found in my research anyway). Error is this: The following information can be helpful to determine why the assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded.

I have two files in my bin folder named AjaxExtentionsToolbox.Exclude and AjaxExtentionsToolbox.Refresh.Exclude - I'm not sure what the exclude extension means but it seems that it directs the compiler to ignore it? I tried to install a new AjaxExtensionsToolbox and got an error that the install process couldn't find a 2010, 2012, 2015, or 2019 version of Visual Studio.

Can anybody confirm this is a problem with AJAX and perhaps give me pointers on how to resolve it.