hi @Yoichi
Upon Reading the record,
The headers is unchecked.
Because it has a duplicate column in the record
so i must read it without header to get the 1st Column (Person Number)
But it thorws me error like this
in_dtRoaster.AsEnumerable.GroupBy(Function(r) r(“Column1”).ToString).Select(Function(g) g.OrderBy(Function(r) DateTime.Parse(r(“Column15”).ToString)).Last).CopyToDataTable
Please help
Thank you