Currently, this is a limitation which appears when using ColumnGroupsViewDefinition
. Due to the nature of this issue, I am not able to provide a suitable work around. The issue is logged in our issue tracking system and we will consider addressing it in a future version.
Should you have any other questions, do not hesitate to ask.
the Telerik team
Q2’11 SP1 of RadControls for WinForms is available for download (see what's new); also available is the Q3'11 Roadmap for Telerik Windows Forms controls.