ขอโค้ด จัดเรียงข้อมูลใน combobox จากน้อยไปหามาก เนื่องจากได้ดึงข้อมูลมาจากฐานข้อมูล

private void FrmCar_Load(object sender, EventArgs e)
        {
            string constr = Properties.Settings.Default.DatabaseCarserviceConnectionString;
            OleDbConnection conn = new OleDbConnection(constr);
            conn.Open();
            string sql = "SELECT * FROM Car";
            OleDbCommand cmd = new OleDbCommand(sql, conn);
            OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);
            DatabaseCarserviceDataSet data = new DatabaseCarserviceDataSet();
            adapter.Fill(data, "Car");
            dataGridView1.DataSource = data.Tables["Car"];
            conn.Close();
            cmd.Connection = conn;
            cmd.CommandText = "SELECT Cus_ID FROM Customer";
            try
            {
                conn.Open();
                OleDbDataReader reader = cmd.ExecuteReader();
                cmbCusID.Text = "Select ID";
                while (reader.Read())
                {
                    cmbCusID.Items.Add(reader["Cus_ID"].ToString());
                }
            }
            catch
            {
            }
            finally
            {
                conn.Close();
            }
        }

cmd.CommandText = "SELECT Cus_ID FROM Customer ORDER BY Cus_ID ASC";