Row Header definition of a DataGrid across the rows of a column of a DataTable using C # WPF

I have a DataTable with the following information:

Column1 | Column2

1    |   A
2    |   B
3    |   C
4    |   D

With this DataTable I would like to load a DataGrid using the first column of the DataTable to be the Row Header, thus

  A    B   C   D

1

2

3

4

Just put Column2 (at the top) I got it in a way, passing the data from DataTable1 to DataTable2 so I could load it into the DataGrid as follows:

where DtGrade is the DataTable to receive the top column

                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        dtGrade.Columns.Add(dt.Rows[i][1].ToString());
                    }

                    gvDados.ItemsSource = null;
                    gvDados.ItemsSource = dtGrade.DefaultView;

Now I would like to add the columns on the left side.