C# DataGridView select row by right mouse button click

private void dgv_MouseDown(object sender, MouseEventArgs e){
    DataGridView.HitTestInfo Hti;

    if (e.Button == MouseButtons.Right)
    {
        Hti = dgv.HitTest(e.X, e.Y);

        if (Hti.Type == DataGridViewHitTestType.Cell)

        {

            if (!((DataGridViewRow)(dgv.Rows[Hti.RowIndex])).Selected)

            {

                dgv.ClearSelection();

                ((DataGridViewRow)dgv.Rows[Hti.RowIndex]).Selected = true;

            }

        }

    }

}