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Unable to create type 'ajaxToolkit:ToolkitScriptManager'. Could not load file or assembly RRS feed

  • Question

  • User-1090619508 posted

    We are in the process of migrating from a Windows Server 2003 to a Windows Server 2012. Everything was built prior to my starting in this position, added to that, I am just not sure what needs done so here is my question.

    I moved the code to the new server but when I try and access the webpage, I am getting the following error:

    Unable to create type 'ajaxToolkit:ToolkitScriptManager'. Could not load file or assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

    There is a copy of the AjaxControlToolkit.dll in the /bin folder of the application, but is this error telling me I need to install the AjaxControlToolkit on the new server or should I be able to use the Control Toolkit without some installation on the server but if I need to install something, how do I know the proper version, or can I install the latest and it has backward compatibility?

    Monday, January 4, 2016 5:53 PM

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