'Declaration Public Class ExpandableGroupBoxControlCollection Inherits System.Windows.Forms.Control.ControlCollection
public class ExpandableGroupBoxControlCollection : System.Windows.Forms.Control.ControlCollection
The UltraExpandableGroupBox can only have one child control, an UltraExpandableGroupBoxPanel. This class ensures that this requirement is satisfied by overriding the Add and Remove methods.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2