The C1FlexGridGroupPanel is a new control that provides a UI for managing groups in C1FlexGrid controls.
The C1FlexGridGroupPanel control is currently available in Silverlight and WPF versions. It is implemented as a separate assembly (C1.Silverlight.FlexGrid.GroupPanel.4.dll, C1.Silverlight.FlexGrid.GroupPanel.5.dll, or C1.WPF.FlexGrid.GroupPanel.4.dll, depending on the platform).