Hello,
This is an interesting problem i think. We are taking "The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)." error. We have a code block like this:
<table>
<tr>
<td>
<%="Example Here" %>
</td>
</tr>
</table>
<telerik:RadDockLayout runat="server" ID="rdlGallery" OnSaveDockLayout="rdlGallery_SaveDockLayout" OnLoadDockLayout="rdlGallery_LoadDockLayout">
<telerik:RadDockZone runat="server" ID="rdzGallery" Width="600" MinHeight="100" Orientation="Horizontal"></telerik:RadDockZone>
</telerik:RadDockLayout>