or
PdfFormatProvider provider = new PdfFormatProvider();RadFixedDocument document = new RadFixedDocument(); using (Stream input = File.OpenRead(@"C:\Test.pdf")){document = provider.Import(input);}

<telerik:RadAjaxManager ID="ajaxManager" runat="server" EnablePageHeadUpdate="False"> <AjaxSettings> <telerik:AjaxSetting AjaxControlID="documentUploader"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="grdDocuments" /> </UpdatedControls> </telerik:AjaxSetting> </AjaxSettings> </telerik:RadAjaxManager>