Hi!

We've been subclassing third-party UI controls (Syncfusion) and, following Kevin McNeish's example (as seen in an msdn magazine article), let the subclassed components inherit from the MM binding and security interfaces.
Upon dragging two CheckBoxAdv on the UI and building the following errors occur :

Duplicate declaration of member 'ControlID'
Duplicate declaration of member 'ControlID'

and the two CheckBoxAdv disappear from the UI. They are still in the generated code though.
We've tried, for each of the CheckBoxAdv, to generate a GUID, saving and building with the same result. Until now, the CheckBoxAdv and ComboBoxAdv are the only ones that we have had these problems with.

Regards

-Filip