Could not find any resources appropriate for the specified culture or the neutral culture. Make sure "AjaxControlToolkit.Properties.Resources.NET4.resources" was correctly embedded or linked into assembly "AjaxControlToolkit" at compile time, or that all the satellite assemblies required are loadable and fully signed.
Sayfaya aşağıdaki tagı ekleyin <asp:ScriptManager ID="ScriptManager1" runat="server"><asp:ScriptManager>