public static class Email  {    /// <summary>    /// 發件人    /// </summary>    public static string mailFrom { get; set; }    /// <summary>    /// 收件人    /// </summary>    public static string[] mailToArray { get; set; }    /// <summary>    /// 抄送    /// </summary>    public static string[] mailCcArray { get; set; }    /// <summary>    /// 標題    /// </summary>    public static string mailSubject { get; set; }    /// <summary>    /// 正文    /// </summary>    public static string mailBody { get; set; }    /// <summary>    /// 發件人密碼    /// </summary>    public static string mailPwd { get; set; }    /// <summary>    /// SMTP郵件服務器    /// </summary>    public static string host { get; set; }      /// <summary>    /// 郵件服務器端口    /// </summary>    public static int port { get; set; }    /// <summary>    /// 正文是否是html格式    /// </summary>    public static bool isbodyHtml { get; set; }    /// <summary>    /// 附件    /// </summary>    public static string[] attachmentsPath { get; set; }    public static bool Send()    {      //使用指定的郵件地址初始化MailAddress實例      MailAddress maddr = new MailAddress(mailFrom);      //初始化MailMessage實例      MailMessage myMail = new MailMessage();      //向收件人地址集合添加郵件地址      if (mailToArray != null)      {        for (int i = 0; i < mailToArray.Length; i++)        {          myMail.To.Add(mailToArray[i].ToString());        }      }      //向抄送收件人地址集合添加郵件地址      if (mailCcArray != null)      {        for (int i = 0; i < mailCcArray.Length; i++)        {          myMail.CC.Add(mailCcArray[i].ToString());        }      }      //發件人地址      myMail.From = maddr;      //電子郵件的標題      myMail.Subject = mailSubject;      //電子郵件的主題內容使用的編碼      myMail.SubjectEncoding = Encoding.UTF8;      //電子郵件正文      myMail.Body = mailBody;      //電子郵件正文的編碼      myMail.BodyEncoding = Encoding.Default;      //電子郵件優先級      myMail.Priority = MailPriority.High;      //電子郵件不是html格式      myMail.IsBodyHtml = isbodyHtml;      //在有附件的情況下添加附件      try      {        if (attachmentsPath != null && attachmentsPath.Length > 0)        {          Attachment attachFile = null;          foreach (string path in attachmentsPath)          {            attachFile = new Attachment(path);            myMail.Attachments.Add(attachFile);          }        }      }      catch (Exception err)      {        throw new Exception("在添加附件時有錯誤:" + err.Message);      }      SmtpClient client = new SmtpClient();      //指定發件人的郵件地址和密碼以驗證發件人身份      client.Credentials = new NetworkCredential(mailFrom, mailPwd);      //設置SMTP郵件服務器      //client.Host = "smtp." + myMail.From.Host;      client.Host = host;      //SMTP郵件服務器端口      client.Port = port;      //是否使用安全連接      //client.EnableSsl = true;      try      {        //將郵件發送到SMTP郵件服務器        client.Send(myMail);        return true;      }      catch (SmtpException ex)      {        string msg = ex.Message;        return false;      }    }