如何下载电子邮件附件asp.net网页表格？

protected void DownloadAttachment_Click(object sender, EventArgs e)
{
    // 连接到邮件服务器并获取电子邮件的详细信息
    SmtpClient client = new SmtpClient("smtp.example.com", 587);
    client.Credentials = new NetworkCredential("username", "password");
    client.EnableSsl = true;

    MailMessage message = new MailMessage();
    message.From = new MailAddress("sender@example.com");
    message.To.Add(new MailAddress("recipient@example.com"));
    message.Subject = "Test Email";
    message.Body = "This is a test email.";

    // 发送邮件
    client.Send(message);

    // 获取邮件的附件列表
    List<Attachment> attachments = new List<Attachment>();
    foreach (Attachment attachment in message.Attachments)
    {
        attachments.Add(attachment);
    }

    // 下载附件
    foreach (Attachment attachment in attachments)
    {
        // 设置响应头信息
        Response.ContentType = "application/octet-stream";
        Response.AddHeader("Content-Disposition", "attachment; filename=" + attachment.Name);

        // 将附件的二进制数据写入HTTP响应流
        Response.BinaryWrite(attachment.ContentStream.ToArray());
        Response.End();
    }
}