如何使用windows的c#应用程序管理邮件和附件

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

class Program
{
    static void Main()
    {
        try
        {
            SmtpClient client = new SmtpClient("smtp.example.com", 587);
            client.EnableSsl = true;
            client.Credentials = new NetworkCredential("your-email@example.com", "your-password");

            MailMessage message = new MailMessage();
            message.From = new MailAddress("your-email@example.com");
            message.To.Add("recipient@example.com");
            message.Subject = "邮件主题";
            message.Body = "邮件正文";

            Attachment attachment = new Attachment("path/to/attachment");
            message.Attachments.Add(attachment);

            client.Send(message);
            Console.WriteLine("邮件发送成功！");
        }
        catch (Exception ex)
        {
            Console.WriteLine("邮件发送失败：" + ex.Message);
        }
    }
}