You could query the dataset and then loop the selected rows to set them as delete.
var rows = dt.Select("col1 > 5");
foreach (var row in rows)
{ row.Delete(); }
dt.AcceptChanges();
… and you could also create some extension methods to make it easier …
myTable.Delete("col1 > 5");
public static DataTable Delete(this DataTable table, string filter)
{
table.Select(filter).Delete();
return table;
}
public static void Delete(this IEnumerable<DataRow> rows)
{
foreach (var row in rows)
row.Delete();
}