C#中异步发送邮件源码

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MailMessage m = new MailMessage
    "This is the subject for the authorized email.",
    "This is the body of the authorized mail!...");
 
client.Credentials = new NetworkCredential("user", "password");
client.EnableSsl = true;
 
client.SendCompleted += new SendCompletedEventHandler(mail_SendCompleted);
 
client.SendAsync(m, null);
 
void mail_SendCompleted(object sender, AsyncCompletedEventArgs e)
{
    if (e.Cancelled)
        Console.WriteLine("Message cancelled");
    else if (e.Error != null)
        Console.WriteLine("Error: " + e.Error.ToString());
    else
        Console.WriteLine("Message sent");
}