I get the same error message every time I build my project.
There are no runtime problems!!!
As long as I add "simple controls" everything works fine.
But when I add a UserControl to one of the panels I get the error message all the time!!
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Error setting property "EnableHostControlMode" in class "Telerik.WinControls.UI.RadPanelBarGroupElement" to value "True".
The error was:
System.InvalidOperationException: Element already added
bei System.ComponentModel.ReflectPropertyDescriptor.SetValue(Object component, Object value)
bei Telerik.WinControls.Design.RadObjectCustomPropertyDescriptor.SetValue(Object component, Object value)
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OK
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This happens even if the user control is an empty control with no code at all.
regards
Manfred