/// <summary>
        /// 最简单的发送邮件实例
        /// </summary>
        /// <param name="title">邮件标题</param>
        /// <param name="mailReceive">接收有地址</param>
        /// <param name="content">邮箱内容</param>
        public void MailSend(string title, string mailReceive,string content)
        {
            //MailAddress:表示电子邮件发件人或收件人的地址
            MailAddress from = new MailAddress("yinll25@163.com"); 
            // MailMessage:表示可以使用 System.Net.Mail.SmtpClient 类发送的电子邮件。
            System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
            mail.Subject = title; //设置标题
            mail.To.Add(mailReceive); //接收地址
            mail.Body = content; //内容
            mail.From = from;
  
            //SmtpClient:允许应用程序使用简单邮件传输协议 (SMTP) 来发送电子邮件
            SmtpClient client = new SmtpClient();
  
            //设置邮箱服务器地址
            client.Host = "smtp.163.com";
  
            //获取或设置用于验证发件人身份的凭据
            client.Credentials = new System.Net.NetworkCredential("yinll25", "yin__15874151521");
              
            //正式发送咯
            client.Send(mail);
        }