C#使用线程时传参

        /// <summary>
        /// 邮件发送，使用http发送
        /// </summary>
        /// <param name="toEmail">发件人，可以英文逗号分隔</param>
        /// <param name="emailTitle">邮件标题</param>
        /// <param name="emailBody">邮件内容</param>
        /// <returns></returns>
        public static string SendEmailByOA(string toEmail, string emailTitle, string emailBody)
        {
            //发送结果
              string sendResult = string.Empty;

            Thread thread = new Thread(() => SendEmail(toEmail, emailTitle, emailBody));
            thread.Start();

            return sendResult;
        }

        private static void SendEmail(string toEmail, string emailTitle, string emailBody)
        {
            string resultMessage = "";
            try
            {
                string mailFrom = SendMail.MailHelper.MailServerFrom;
                string mailTo = toEmail;
                string mailCC = "";
                string mailSubject = emailTitle;
                string mailBody = emailBody;
                string mailAttch = "";
                SendMail.MailHelper.SendNetMail(mailFrom, mailTo, mailSubject, mailBody, mailAttch, "", mailCC, out resultMessage);
            }
            catch (Exception ex) { }
        }

参考：http://www.cnblogs.com/lexiaoyao/archive/2011/12/01/2271120.html