How do you get the Deleted DataRows of a DataSet?

My program uses DataRow.Delete to delete rows from a DataSet.  After they have been deleted, I check it's RowState which is Deleted and then I call GetChanges() on the DataSet.  The changes returned do not include the deleted rows.  If I can't use GetChanges after a series of Delete()'s to find out what has changed in the DataSet, what can I use to find out wihch rows  have been deleted.  Do I need to keep track of the deletions myself?

My code to delete and get changes is below.


int rowIdx = dataGrid1.CurrentRowIndex;
DataSet ds = (DataSet)dataGrid1.DataSource;
DataRow rowToDelete = ds.Tables["Msgs"].Rows[rowIdx];
rowToDelete.Delete();

DataSet changes = ds.GetChanges();
if (changes != null)
{
     string changesString = changes.GetXml();
     MessageBox.Show(changesString);
}