Hi, How can i disable grouping for  some columns in XceedDataGrid control ???

I'm converting to the WPF DataGrid from the .Net WinForms version. The transition is killing me! One thing I've noticed right away is the GroupByHeader grouped value displays the underlying bound data, rather than the content from the CellContentTemplate. I'm running across this with the ComboBox using the DataTableDictionary examples.  The ...