how to convert a table from database to .txt(text) format?

  private void Form1_Load(object sender, EventArgs e)
        { 
          Timer MyTimer = new Timer();       
          MyTimer.Interval = (10000); 
          MyTimer.Tick += new EventHandler(timer1_Tick_1);      
          MyTimer.Start();         
        }

 private void timer1_Tick_1(object sender, EventArgs e)
        {
            employeedetails();
        }

public void employeedetails()
        {
            SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["nConnectionString"].ConnectionString);

            // using (SqlConnection connection = new SqlConnection(str))
            {
                try
                {
                    conn.Open();
                }
                catch (System.Data.SqlClient.SqlException ex)
                {

                    return;
                }
                string selectCommandText = "SELECT distinct      userid,fullname,lastname,firstname,localjobtitle,employmentstatusid,dateofjoining,dateofexit,siteid,email,topfunctionid,active,exitingthecompany,lmsroleid,locallanguagejobtitle FROM tblUserProfile up,tblreportingto tr,tblCountry where temo is null ";
                using (SqlDataAdapter adapter = new SqlDataAdapter(selectCommandText, conn))
                {
                    using (DataTable table = new DataTable("tblUserProfile"))
                    {
                        adapter.Fill(table);
                        StringBuilder commaDelimitedText = new StringBuilder();
                        //commaDelimitedText.Append("EMP_Number|Name|Lastname|Firstname|Middleinitial|NameSuffix|Positiontitle|EMPcode|EMPstatus|Manager number|Approvernumber|Startdate|Enddate|Lastreviewdate|Address1|Address2|City|State|Zipcode|Country|Email|Phone1|Phone2|Fax|URL|Note|DomainCode|Organizationcode|Jobcode|Active|Enabled|Username|NTlogin|Role|Timezone|Currency|Language|Text1|Text2|Text3|Text4|Memo1|Date1|Date2|Indicator1|Money1|Integer1|Float1|JobJoiningdate|Organizationjoiningdate");
                        foreach (DataRow row in table.Rows)
                        {
                            string value = string.Format("{0}|{1}|{2}|||{3}||{4}|{5}||||||{6}||{7}|{8}|{9}||||||||{10}|{11}|{12}|{13}|", row[0], row[1], row[2], row[3], row[4], row[5], row[6], row[7], row[8], row[9], row[10], row[11], row[12], row[13], row[14]);
                            commaDelimitedText.AppendLine(value);
                        }

                        File.AppendAllText(@"C:\Documents and Settings\aj99823\Desktop\project\Employee Details.txt", commaDelimitedText.ToString());

                    } 
                }
            }
        }