c# - Windowsアプリケーションは、docファイルから名前の電子メールIDと連絡先を抽出します

Question

word 文書ファイルから name、contactno、emailid を抽出したい

public void Opendoc(object file)
        {
            Microsoft.Office.Interop.Word.Application wpp = new Microsoft.Office.Interop.Word.Application();
            object nobj = System.Reflection.Missing.Value;

            Microsoft.Office.Interop.Word.Document doc = wpp.Documents.Open(ref file, ref nobj, ref nobj, ref nobj,
                            ref nobj, ref nobj, ref nobj, ref nobj, ref nobj, ref nobj,
                            ref nobj, ref nobj, ref nobj, ref nobj, ref nobj, ref nobj);
            int i = 1;
            List <string> emailCollection = new  List<string>();
            foreach (Microsoft.Office.Interop.Word.Paragraph objParagraph in doc.Paragraphs)
 try
                {
                    string emailaddress = document.Paragraphs[1].Range.Text;
                    emailaddress = EmailExtractot(emailaddress).TrimEnd();
                    if (IsEmail(emailaddress))
                    {
                        emailCollection.Add(emailaddress);
                    }
                }
                catch (Exception ex) { throw ex; } i++;

            } // close document and Quit Word 
            document.Close(ref nullobj, ref nullobj, ref nullobj);

        }

 public const string MatchEmailPattern = @"^(([\w-]+\.)+[\w-]+|([a-zA-Z]{1}|[\w-]{2,}))@"
     + @"((([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\.([0-1]?
                [0-9]{1,2}|25[0-5]|2[0-4][0-9])\."
     + @"([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\.([0-1]?
                [0-9]{1,2}|25[0-5]|2[0-4][0-9])){1}|"
     + @"([a-zA-Z]+[\w-]+\.)+[a-zA-Z]{2,4})$";
  public static bool IsEmail(string email)
        {
            if (email != null) return Regex.IsMatch(email, MatchEmailPattern);
            else return false;
        }

 private static string EmailExtractot(string orginal)
        {

            int index = orginal.IndexOf('@',' ');
            int beforeEmptySpace = orginal.Substring(0, index).LastIndexOf(' ');
            string spiled = orginal.Substring(index, (orginal.Length - index));
            int afterEmptySpace = spiled.IndexOf(' ');
            string emailAddress = orginal.Substring(beforeEmptySpace + 1, (index - beforeEmptySpace) + afterEmptySpace);
            return emailAddress;
        }

しかし、このコードは機能しません