vs2005中发送邮件的方法（C#）

System.Net.Mail.SmtpClient client = new SmtpClient();
client.Host = "smtp.163.com";
client.UseDefaultCredentials = false;
client.Credentials = new System.Net.NetworkCredential("你的163用户名", "*****");
//星号改成自己邮箱的密码
client.DeliveryMethod = SmtpDeliveryMethod.Network;
System.Net.Mail.MailMessage message = new MailMessage("你的163邮箱地址", "收件人邮箱地址");
message.Subject = "测试";
message.Body = "用自己写的软件发的邮件！";
message.BodyEncoding = System.Text.Encoding.UTF8;
message.IsBodyHtml = true;
//添加附件
Attachment data = new Attachment(@"附件地址如：e:/a.jpg", System.Net.Mime.MediaTypeNames.Application.Octet);
message.Attachments.Add(data);

try
{
client.Send(message);
MessageBox.Show("Email successfully send.");
}
catch (Exception ex)
{
MessageBox.Show("Send Email Failed." + ex.ToString());
}
用上面介绍的方法实现C＃邮件发送小程序

界面设计如下：