Read-Only cell in DataGridView .Net 3.5

<pre lang="cs">if(Set_some_cells_readonly && (e.ColumnIndex == 0
    || e.ColumnIndex == 1
    || e.ColumnIndex == 2))
{
    // The cells must be set readonly otherwise edit proceeds as normal
    // even with an e.cancel - all that does is kill the begin process
    dgv.Rows[e.RowIndex].Cells[0].ReadOnly = true;
    dgv.Rows[e.RowIndex].Cells[1].ReadOnly = true;
    dgv.Rows[e.RowIndex].Cells[2].ReadOnly = true;
    dgv.CurrentCell.Selected = false;
    // It is not enough to end the edit, we must leave the cell otherwise
    // it remains in write mode for this turn and only becomes readonly
    // after this edit event ends.
    dgv.CurrentCell = nullptr;
    return; // just in case any other code 'slips in' at a later date
}
else
    {
        dgv.Rows[e.RowIndex].Cells[0].ReadOnly = false;
        dgv.Rows[e.RowIndex].Cells[1].ReadOnly = false;
        dgv.Rows[e.RowIndex].Cells[2].ReadOnly = false;
    }

Private Sub dgv_CellBeginEdit(sender As Object, e As DataGridViewCellCancelEventArgs) Handles dgv.CellBeginEdit

 If e.RowIndex = 0 And e.ColumnIndex = 1 Then
    e.Cancel = True
 End If

End Sub

Private Sub dgv_UserDeletingRow(sender As Object, e As DataGridViewRowCancelEventArgs) Handles dgv.UserDeletingRow
    e.Cancel = True
End Sub