/// <summary>
        /// 邮件推送
        /// </summary>
        /// <returns></returns>
        [Obsolete]
        public static async Task SendMailAsync(string email,string Content,string PushType,string filder)
        {
            string smtpService = "smtp.qq.com";
            string sendEmail = "你的qq号@qq.com";
            string sendpwd = "kcbglwpdsqxjceda";//你开启qq设置的时候，会生成一个key值，复制过来就行了。
            //确定smtp服务器地址 实例化一个Smtp客户端
            SmtpClient smtpclient = new SmtpClient();
            smtpclient.Host = smtpService;
            //确定发件地址与收件地址
            MailAddress sendAddress = new MailAddress(sendEmail);
            MailAddress receiveAddress = new MailAddress(email);
            //构造一个Email的Message对象 内容信息
            MailMessage mailMessage = new MailMessage(sendAddress, receiveAddress);
            mailMessage.Subject = PushType + DateTime.Now;
            mailMessage.SubjectEncoding = System.Text.Encoding.UTF8;
            mailMessage.Body = Content;
            mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
            //邮件发送方式  通过网络发送到smtp服务器
            smtpclient.DeliveryMethod = SmtpDeliveryMethod.Network;
            //如果服务器支持安全连接，则将安全连接设为true
            smtpclient.EnableSsl = true;
            try
            {
                //是否使用默认凭据，若为false，则使用自定义的证书，就是下面的networkCredential实例对象
                smtpclient.UseDefaultCredentials = false;
                //指定邮箱账号和密码,需要注意的是，这个密码是你在QQ邮箱设置里开启服务的时候给你的那个授权码
                NetworkCredential networkCredential = new NetworkCredential(sendEmail, sendpwd);
                smtpclient.Credentials = networkCredential;
                //发送邮件
                smtpclient.Send(mailMessage);
               Console.WriteLine("发送邮件成功");
            }
            catch (System.Net.Mail.SmtpException ex)
            {
               Console.WriteLine(ex.Message, "发送邮件出错");
            }
        }