Problem With Send File To Mail

See more:

C#

Hi All

I Try Send Message With MailMessage Class But This Error Occurred :
A form Address Must be Specified.

my code snippet

private void SendEmail()
            {    
                System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
    
                System.Net.Mail.Attachment attach = new System.Net.Mail.Attachment(@"C:\MyFile\Instruction.txt");
    
                mail.Attachments.Add(attach);
    
                mail.Body = "";
    
                System.Net.Mail.MailAddress address = new System.Net.Mail.MailAddress("www.aligoglos@yahoo.com");
    
                mail.To.Add(address);
    
                System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient("localhost");
    
                client.Send(mail);
     
               mail.Dispose();
    
                MessageBox.Show("Email Sended");
    
            }

thanks all