使用c#发送带有大附件的邮件

using System;
using System.Net;
using System.Net.Mail;

class Program
{
    static void Main(string[] args)
    {
        // 邮件发送方的邮箱地址和密码
        string senderEmail = "your_email@example.com";
        string senderPassword = "your_password";

        // 邮件接收方的邮箱地址
        string receiverEmail = "receiver_email@example.com";

        // 创建MailMessage对象
        MailMessage mail = new MailMessage();
        mail.From = new MailAddress(senderEmail);
        mail.To.Add(receiverEmail);
        mail.Subject = "邮件主题";
        mail.Body = "邮件内容";

        // 添加附件
        string attachmentPath = "path_to_attachment";
        Attachment attachment = new Attachment(attachmentPath);
        mail.Attachments.Add(attachment);

        // 创建SmtpClient对象
        SmtpClient smtpClient = new SmtpClient("smtp.example.com", 587);
        smtpClient.EnableSsl = true;
        smtpClient.Credentials = new NetworkCredential(senderEmail, senderPassword);

        try
        {
            // 发送邮件
            smtpClient.Send(mail);
            Console.WriteLine("邮件发送成功！");
        }
        catch (Exception ex)
        {
            Console.WriteLine("邮件发送失败：" + ex.Message);
        }
    }
}