sandygettings

at System.Linq.Enumerable.All[TSource](IEnumerable`1 source, Func`2 predicate)
   at AjaxControlToolkit.ToolkitScriptManagerCombiner.GetScriptReferences(HttpContextBase context, String[] bundles)
   at AjaxControlToolkit.ToolkitScriptManagerCombiner.GetCombinedScriptContent(HttpContextBase context, String[] bundles)
   at AjaxControlToolkit.ToolkitScriptManagerCombiner.GetCombinedScriptContentHash(HttpContextBase context, String[] bundles)
   at AjaxControlToolkit.ToolkitScriptManager.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Hello,

I’m glad to see you post the issue to asp.net forum. Based on the exception information you provided, I Think the

exception is caused by Control Bundles in a file located in AjaxControlToolkit.config which at the root of your application.

For this issue, please see the comment in the following link, where StephenWalther has provided entire description and solution

for a similar exception with you. Please try the method mentioned in it.

    http://stephenwalther.com/archive/2013/07/25/july-2013-release-of-the-ajax-control-toolkit

If I misunderstand your issue, please do not hesitate to feedback.

Best regards!