Hi Martin,

Placing a Component 'on a UserControl', in the standard sense of the phrase,
doesn't require serialization.  In VS.NET you can drag your Component from
the Toolbox onto the UserControl designer and the Component will be added to
the designer's Component tray.  In code, you attach the component through
the Components collection of the UserControl, if it was created by VS.NET,
or otherwise just call dispose on the Component yourself.  There is no need
to actually attach a Component to a UserControl.

If this error is specific to your code, posting some of the code might be
more helpful to the newsgroup.

ISerialization doesn't exist in the framework, however ISerializable does.
Component derives from MarshalByRefObject so implementing ISerializable on a
Component is not a good design anyway.

HTH