รบกวนถามเรื่องการสร้างกราฟของ c# ครับ (Winform) หาวิธีไม่ได้จริงๆ

conn = new conDB().SetConnection();
            conn.Open();
            try
            {
                string test = textBox1.Text;
                string sql = "select QUANTITY_Order from Order1 where  Order1.ID_Product = '" + test + "' ";
                SqlCommand testcommand = new SqlCommand(sql, conn);
                da = new SqlDataAdapter(testcommand);
                ds = new DataSet();
                da.Fill(ds, "order1");
                int i = 0;
                foreach (DataRow row in ds.Tables["order1"].Rows)
                {
                    string seriesName = i.ToString();
                    chart1.Series.Add(seriesName);
                    chart1.Series[seriesName].ChartType = SeriesChartType.Line;
                    chart1.Series[seriesName].BorderWidth = 2;

                    for (int colIndex = 1; colIndex < ds.Tables["order1"].Columns.Count; colIndex++)
                    {
                        // For each column (column 1 and onward) add the value as a point
                        string columnName = ds.Tables["order1"].Columns[colIndex].ColumnName;
                        int YVal = (int)row[columnName];

                        chart1.Series[seriesName].Points.AddXY(columnName, YVal);
                    }
                    i = i + 2;
                }
                MessageBox.Show("test");
            }
            catch (Exception ex)
            {
                Console.WriteLine("test :" + ex);
            }