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

Asked Jan 04 '16 at 14:26

Active Jan 04 '16 at 14:26

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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 as well and if so, can I install the latest version, or do I need a specific version?

asked Jan 04 '16 at 14:26

Kocheese

http://stackoverflow.com/questions/40116/how-do-i-install-and-use-the-asp-net-ajax-control-toolkit-in-my-net-3-5-web-app – 2174714 Jan 04 '16 at 14:34
I have all that is listed in my project and web.config – Kocheese Jan 04 '16 at 14:42
– Kocheese Jan 04 '16 at 14:42
Did you upgrade your project to the latest v15.1 Ajax Control Toolkit? – Mikhail Tymchuk Jan 11 '16 at 08:53
No, I was using the same version of the toolkit in the new environment. Would an update / upgrade be needed? – Kocheese Feb 24 '16 at 17:42

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

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