Writing datarows to a .txt file using streamwriter

See more:

C#

text

I have a logic issue that seems so easy, but am having trouble trying figure it out.

I am writing to a .txt file using a StreamWriter and that is working fine as it should. The thing is, is I am looping through the rows and need to write a "9" after the looping, but the way it is set up, a "9" gets printed for every row.

How can I write the "9" to the file after all the rows are written? Here is the code. Thank you!

foreach (DataRow dr in dt.Rows)
                        {
                            if (dr[12].ToString().Contains("55|"))
                            {
                                string file55 = "C:\\authorize.netTEST\\55-Authorize.Net - " + date1 + " @ " + date2 + ".ach";
                                StreamWriter sw = new StreamWriter(file55, true);//inetpub\temp
                                if (dr[0].ToString() != "2")
                                {
                                    if (dr[9].ToString() != "Total Amount")
                                    {
                                        sw.Write("6                            ");
                                        sw.Write(dr[9].ToString().Replace(".", "").Replace(",", "").PadLeft(10, '0'));
                                        sw.Write((dr[12].ToString().Replace("55|","")).PadRight(15, ' '));
                                        sw.Write((dr[13].ToString() + " " + dr[14].ToString()).PadRight(40));
                                        sw.Write(sw.NewLine);
                                    }
                                }

                                    sw.Write("9");
                                    sw.Write(sw.NewLine);

                                sw.Close();

                                Session.Add("DatedFileName", file55);
                            }if (dr[12].ToString().Contains("99|"))
                                {
                                string file99 = "C:\\authorize.netTEST\\99-Authorize.Net - " + date1 + " @ " + date2 + ".ach";
                                StreamWriter sw = new StreamWriter(file99, true);//inetpub\temp
                                if (dr[0].ToString() != "2")
                                {
                                    if (dr[9].ToString() != "Total Amount")
                                    {
                                        sw.Write("6                            ");
                                        sw.Write(dr[9].ToString().Replace(".", "").Replace(",", "").PadLeft(10, '0'));
                                        sw.Write((dr[12].ToString().Replace("99|", "")).PadRight(15, ' '));
                                        sw.Write((dr[13].ToString() + " " + dr[14].ToString()).PadRight(40));
                                        sw.Write(sw.NewLine);
                                    }
                                }
                                    sw.Write("9");
                                    sw.Write(sw.NewLine);
                                 sw.Close();
                                Session.Add("DatedFileName2", file99);
                            }
                         }
                }