Sorting rows in a data table C#

Create a new DataTable from a DataView that you create from your original DataTable. 
Apply whatever sorts and/or filters you want on the DataView and then create a new DataTable from the DataView using the DataView.ToTable method

 DataView dv = ft.DefaultView;  
 dv.Sort = "occr desc";  
 DataTable sortedDT = dv.ToTable();