I have imported the configuratorpanel.cs into my application and use it in a webform
The control works, but the compiler always creates an error in the designerfile..

it doesn't accept the namespace.
even if i comment out the namespace, then it doesn't find the configuratorpanel

<%@ Register TagPrefix="qsf"   Namespace="Telerik.QuickStart"%>
..
                        <qsf:ConfiguratorPanel runat="server" Title="neu" Expanded="false" Orientation="Horizontal" ID="cnfPanel_Folder_Neu">
                            <telerik:RadTextBox ID="tbxFolder_Title_Neu" runat="server" LabelWidth="64px" Resize="None" Skin="Silk" Width="160px" DisplayText="Neuer Order..">
                            </telerik:RadTextBox>
                            <telerik:RadTextBox ID="tbxFolder_Description_Neu" runat="server" LabelWidth="64px" Resize="None" Skin="Silk" Width="160px" DisplayText="Beschreibung..">
                            </telerik:RadTextBox>
                        </qsf:ConfiguratorPanel>

..


and in the configuratorpanel.cs file
----
namespace Telerik.QuickStart
{
    public enum ConfiguratorPanelOrientation
    {
        Horizontal,
        Vertical
    }

    public class ConfiguratorPanel : Panel, IPostBackDataHandler
    {
        protected override void RenderContents(HtmlTextWriter writer)
        {
----

_loadChildrenFromWebService() is a good client-side way of 'pre-caching' downlevel menu items while its being expanded. I would like this method to have a fully supported, external method, so that it might be maintained in future releases (it was broken in Q3 2012 for Android browsers for instance).

Additionally, it would be useful to avoid round trips, if it could work from a set of RadMenuItems, so that several RadMenuItems could have their children populated in a single request to the server.

Add the possibility to use radmenu with lava lamp effect.

Example: http://www.queness.com/resources/html/lava/index.html