<system.net>
  <mailSettings>
    <smtp from="your-email@example.com">
      <network host="smtp.example.com" port="587" userName="your-username" password="your-password" enableSsl="true" />
    </smtp>
  </mailSettings>
</system.net>

@{
    // 引用命名空间
    using System.Net;
    using System.Net.Mail;

    // 发送电子邮件的函数
    void SendEmail(string to, string subject, string body)
    {
        // 从配置中获取SMTP服务器和凭据
        string smtpServer = System.Configuration.ConfigurationManager.AppSettings["smtpServer"];
        int smtpPort = int.Parse(System.Configuration.ConfigurationManager.AppSettings["smtpPort"]);
        string smtpUsername = System.Configuration.ConfigurationManager.AppSettings["smtpUsername"];
        string smtpPassword = System.Configuration.ConfigurationManager.AppSettings["smtpPassword"];

        // 创建SmtpClient实例
        using (SmtpClient client = new SmtpClient(smtpServer, smtpPort))
        {
            // 设置凭据
            client.Credentials = new NetworkCredential(smtpUsername, smtpPassword);
            client.EnableSsl = true;

            // 创建MailMessage实例
            using (MailMessage mailMessage = new MailMessage())
            {
                // 设置发件人、收件人、主题和正文
                mailMessage.From = new MailAddress(smtpUsername);
                mailMessage.To.Add(to);
                mailMessage.Subject = subject;
                mailMessage.Body = body;

                // 发送邮件
                client.Send(mailMessage);
            }
        }
    }

    // 调用发送电子邮件的函数
    SendEmail("recipient@example.com", "Test Email", "This is a test email from ASP.NET Web Pages.");
}