Was this error a bugs on AJAX Control Toolkit or what?

Kindly explain if the error below was a bugs on AJAX Control Toolkit or cause by what.

Error:

System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. --> System.NotSupportedException: This page is missing a HtmlHead control which is required for the CSS stylesheet link that is being added. Please add . at AjaxControlToolkit.ScriptObjectBuilder.RegisterCssReferences(Control control) in d:\E\AjaxControlToolkit\Release\AjaxControlToolkit\ExtenderBase\ScriptObjectBuilder.cs:line 229 at AjaxControlToolkit.ScriptControlBase.OnPreRender(EventArgs e) in d:\E\AjaxControlToolkit\Release\AjaxControlToolkit\ExtenderBase\ScriptControlBase.cs:line 270 at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) -- End of inner exception stack trace -- at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.file_utilities_usermaster_edituser_aspx.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Thank you in advance,

Zed

Simple answer looks like no.

From the error it seems you have added a CSS without a head tag..i.e. ina control. And to register that CSS directly as you intend to do...use

AjaxControlToolkit.ScriptObjectBuilder.RegisterCssReferences(Control control)

Hope that helps..

Thank you for your immediate response. My assumptions is that you're correct however the only thing that keeps me on thinking is that I did not changed or modify anything on the page and even the CSS file. The page is working fine from the beginning and suddenly I just received this error. Its kind a weird you know.

Thanks again,

Zed

Hi Zed,

If you want me to investigate, Ia m more then happy to do so, but for that you will have to put the code here , else if its just one occasion, try replicating it. Are you using CSS control adapter by any chance.

If the answer above helped do not forget to mark so.

Thanks