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hi all,
when i am using Rating in .net 3.5 , i am getting the following errors
Could not load type 'System.Web.UI.ScriptReferenceBase' from assembly 'System.Web.Extensions, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

here is my design coding:
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>

please help me
Posted 11-Aug-10 23:02pm
Updated 12-Aug-10 1:55am
E.F. Nijboer 12-Aug-10 6:58am
Please use pre tags for appropriate pieces only and avoid using txtspk.
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Solution 1

<ajaxtoolkit:toolkitscriptmanager id="ScriptManager1" runat="server" xmlns:ajaxtoolkit="#unknown" />

<asp:scriptmanager id="ScriptManager1" runat="server" xmlns:asp="#unknown" />

Check how you register the assembly, must be like:
<![CDATA[<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="cc1" %>

The real fix is to install .net 3.5 sp1 and can be found here (Ajax Control Toolkit expects a .net 3.5 SP1 runtime environment):[^]

Good luck!
hiren soni 9-Mar-12 6:12am
hi....I have the same problem and I have just upgraded to framework 4. Do you think it will work or i must install 3.5 sp1? Because even after upgrading it is not working..
E.F. Nijboer 9-Mar-12 11:01am
Try removing the ajax toolkit and then (re)add reference to the project.
bhimsenpardeshi 12-Mar-12 3:22am
i have already install .net 3.5 sp1 then also, i am getting this error
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Solution 3

Microsoft .NET Framework 3.5 Service Pack 1

once u reach to above link u can download dotnetfx35setup.exe and install and try

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