listOfStrings Count = 13 [0]: "t" [1]: "x" [2]: "m" [3]: "l" [4]: "n" [5]: "s" [6]:
":" [7]: "s" [8]: "s" [9]: "=" [10]: """ [11]: "u" [12]: "r".

3/21/2018 9:57:53 PM    54  West Entrance   West Vending - West Entrance    123456789
FirstName LastName  255061  V4 Protective Eyewear 11    6242-A5 1   $1.71   $1.71   1
$1.71

namespace OutlookAddIn1
{
    public partial class Ribbon1
    {
        //change paths when working
        string path = @"H:Customer Service";
        string archivePath = @"H:Customer ServiceHelpers";
        List<String> listOfStrings = new List<string>();

        private void Ribbon1_Load(object sender, RibbonUIEventArgs e)
        {

        }

        private void button1_Click(object sender, RibbonControlEventArgs e)
        {
            Outlook.Inspector currInspector = null;
            Outlook.MailItem mail = null;
            Outlook.Attachments attachments = null;

            try
            {

                currInspector = Globals.ThisAddIn.Application.ActiveWindow();
                mail = (Outlook.MailItem)currInspector.CurrentItem;
                attachments = mail.Attachments;

                for (int i = 1; i <= attachments.Count; i++)
                {
                    Outlook.Attachment vendFile = attachments[i];
                    //save original in archive folder
                    string archiveFilePath = Path.Combine(archivePath, vendFile.FileName);
                    string processFilePath = Path.Combine(path, vendFile.FileName);
                    vendFile.SaveAsFile(archiveFilePath);

                    //begin document modification and save to path
                    StreamReader streamReader = new StreamReader(new FileStream(archiveFilePath, FileMode.Open, FileAccess.Read));
                    StreamWriter streamWriter = new StreamWriter(new FileStream(processFilePath, FileMode.Create, FileAccess.Write));
                    using (streamReader)
                    using (streamWriter)
                    {
                        while (streamReader.Peek() != -1)
                        {
                            streamReader.ReadLine();
                            streamReader.ReadLine();
                            streamReader.ReadLine();
                            streamReader.ReadLine();
                            streamReader.ReadLine();
                            foreach(var row in streamReader.ReadLine())
                            {
                                listOfStrings.Add(row.ToString());
                            }
                        }
                    }

                    //dispose of COM object
                    Marshal.ReleaseComObject(vendFile);
                }

            }
            catch
            {
                MessageBox.Show("Unable to retrieve attachment");
            }
            finally
            {
                if (attachments != null) Marshal.ReleaseComObject(attachments);
                if (mail != null) Marshal.ReleaseComObject(mail);
                if (currInspector != null) Marshal.ReleaseComObject(currInspector);
            }

        }
    }
}