i have fillUp a ComboBox from database table column "Father Name " as by

1) creating dataSet "dset"
2) dset.Tables[0].Rows.Add(System.DBNull.Value);

I accomplished the task which i wanted, that was insertion of empty row

Now i wanted that empty row be at 1st position, i mean at index = 0, for that i did following step

3) dset.Tables[0].DefaultView.Sort = ColName + " ASC ";
or
4)dset.Tables[0].DefaultView.Sort = ColName + " Desc ";

but the empty row always looking last of all records even i sort dataTable Asc or Desc

Any One can Solve My Problem Please

Thanks