I would like to save and restore the size and order of columns datagrid on a WPF application.I store this data on two lists :\[code\]List<DataGridColumn>List<SortDescription>\[/code\]DataGridColumn and SortDescription are MSDN class not serialiable.I would like to save these list in a file ( xml or txt...)What is the simplest way please ?Best regards,Nixeus