Steps to reproduce: - create a winforms project - create form (normal windows form, not telerik form) - create radgridview from toolbox - right click and open property builder - select mastertemplate - set viewdefinition = columngroups view - add 3-4 columns (textbox, combobox, etc...) - click ok button at the property builder - right click on the radgridview and open the property builder - rename the name and the header text of the first column - click ok button at the property builder