Indirect reference is being made to assembly System.Web.Extensions version 18.104.22.168, which contains 'AjaxControlToolkit.ToolkitScriptManager'. This Project references a prior version of System.Web.Extensions version 1.0.61025.0. To use 'AjaxControlToolkit.ToolkitScriptManager', you must replace the reference to System.Web.Extensions with version 22.214.171.124 or higher.
This is the error I get when I run open a page in an application on my localhost. On another machine the code runs fine.
I understand that it is something about a version. Visual Studio (2005) only has the option to "Add Reference" (from the menu item "Website"), but not "Change Refererence". And besides, what if I chzange the reference, will the site then stop working after being uploaded to the live site? Because there it is working fine.
And what difference does it make anyway? The site works with an older version, I copied everything, including the Bin directory. It should work then, shouldn't it?