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Editorial Team
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Asked: 2026-05-13T00:46:01+00:00

I wanted to switch to the beta version to see if it fixes a

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I wanted to switch to the beta version to see if it fixes a problem I have been having, so I downloaded it and put two dll files into my bin folder. I deleted the old references to these files in visual studio, and re-added them.

When I run my program I get an error:

Microsoft JScript runtime error: AjaxControlToolkit requires ASP.NET Ajax 4.0 scripts. Ensure the correct version of the scripts are referenced. If you are using an ASP.NET ScriptManager, switch to the AjaxScriptManager in System.Web.Ajax.dll, or use the ToolkitScriptManager in AjaxControlToolkit.dll.

I can’t figure out how to fix this. I have the new System.Web.Ajax.dll added to visual studio, but I can’t see any AjaxScriptManager anywhere…

Any ideas?

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1 Answer

  1. Editorial Team

    Adding the following to the aspx file fixed this error for me:

    <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
    </asp:ToolkitScriptManager>
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