Overview Sample Header Vestibulum ut eros non enim commodo hendrerit. Donec porttitor tellus non magna. Nam ligula elit, pretium et, rutrum non, hendrerit id, ante. Nunc mauris sapien, cursus in. Description This sample demonstrates the default C1Expander control behavior. The C1Expander allows you to show or hide embedded or external content within an expanding panel. Set the Expanded property to False if you wish to collapse the content panel. The default value for the Expanded property is True. Documentation