I've searched Hi and Low and can not resolve this. When I went to VS2008 I had the same issue and resolved it with changing my web.config
Now I ma running VS 2012 express. I've installed AjaxControlToolkit version 4.1.60501.0
Web.config:
<compilation debug="false" targetFramework="4.5">
<assemblies>
<add assembly="AjaxControlToolkit, Version=4.1.60501.0, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e"/>
<add assembly="System.Web.Extensions.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
</assemblies>
and
<controls>
<add tagPrefix="cc1" namespace="AjaxControlToolkit" assembly="AjaxControlToolkit"/>
</controls>
In ASPX I have:
<cc1:ToolkitScriptManager ID="ScriptManager1" runat="server">
</cc1:ToolkitScriptManager>
And I'm getting the above error. I know the Toolkit DLL is the correct version.
What needs to change?
Thakns Much,
Jim