C#发送邮件，包含发送附件

/// <summary>
/// 发送邮件
/// </summary>
/// <param name="sendEmail">收件人邮箱</param>
/// <param name="fromEmail">发件人邮箱</param>
/// <param name="fromName">发件人名称</param>
/// <param name="title">邮件标题</param>
/// <param name="body">邮件内容</param>
/// <param name="sendCC">抄送人邮箱</param>
public static void SendEmail(string sendEmail, string fromEmail, string fromName, string title, string body, List<string> sendCC)
{
    MailMessage msg = new MailMessage();
 
    msg.To.Add(sendEmail); //收件人邮箱
    msg.From = new MailAddress(fromEmail, fromName);  //发件人邮箱和名称
    msg.Subject = title;//邮件标题 
    msg.SubjectEncoding = Encoding.UTF8; //邮件标题格式为UTF8 
    msg.Body = body;//邮件内容
    msg.BodyEncoding = Encoding.UTF8; //邮件内容格式为UTF8 
    msg.IsBodyHtml = true;//设置邮件格式为html格式
    //设置抄送人地址
    if (sendCC != null && sendCC.Count > 0)
    {
        foreach (String cc in sendCC)
        {
            msg.CC.Add(cc);
        }
    }
    //添加附件
    //string filePath = @"C:\附件.xls";
    //msg.Attachments.Add(new Attachment(filePath));
 
    SmtpClient client = new SmtpClient();
 
    client.Host = "smtp.qq.com"; //SMTP服务器地址 
    client.Port = 587; //SMTP端口，QQ邮箱填写587 
    client.EnableSsl = true; //启用SSL加密 （使用除QQ邮箱之外的最好关闭）
    client.Credentials = new System.Net.NetworkCredential(fromEmail, "xxxxxxxxxxx"); //发件人邮箱账号，授权码（不是密码）
    try
    {
        client.Send(msg); //发送邮件
    }
    catch (Exception)
    {
        throw;
    }
}

感謝作者分享

https://blog.csdn.net/qq_21275565/article/details/125422780

https://pythonjishu.com/ldzbkuvvhvzqcdi/