private String m_Username = String.Empty; 
    private String m_Password = String.Empty; 
    private String m_SmtpServer = String.Empty; 
         
    /// <summary> 
    /// Value has been set by default at 25. Default value for SmtpServer 
    /// </summary> 
    private int m_Port = 25; 
 
 
/// <summary> 
    /// Sends an email with attachment 
    /// </summary> 
    /// <param name="_from">person who is sending the mail</param> 
    /// <param name="_to">person who will receive the mail</param> 
    /// <param name="_subject">mail subject</param> 
    /// <param name="_message">mail message</param> 
    /// <param name="attachment">file that will be attached to the mail</param> 
    /// <returns>True if mail haas been sent properly. false otherwise</returns> 
    public Boolean Send(String _from, String _to, String _subject, String _message, String attachment) 
    { 
            try { 
        MailAddress from = new MailAddress(_from); 
        MailAddress to = new MailAddress(_to); 
 
        MailMessage em = new MailMessage(from, to); 
                    //em.CC.Add(); It is also possible to add CC or BCC recipient on that way. 
                    //em.Bcc.Add(); 
                    em.BodyEncoding = Encoding.UTF8; 
                    em.IsBodyHtml = true; 
                    em.Subject = _subject; 
                    em.Body = _message; 
		 
                    if(!String.IsNullOrEmpty(attachment)) 
                    { 
                            Attachment a = new Attachment(attachment); 
            em.Attachments.Add(a); 
                    } 
 
                    return Send(em); 
            } 
            catch (Exception exc) { 
                    Trace.WriteLine(String.Format("Email could not be send.", exc)); 
                    return false; 
            } 
    } 
 
    /// <summary> 
    /// Sends a Mail (MailMessage) 
    /// </summary> 
    /// <param name="_message">mail message</param> 
    /// <returns>True if mail haas been sent properly. false otherwise</returns> 
    private Boolean Send(MailMessage _message) 
    { 
            try { 
                    if(String.IsNullOrEmpty(this.m_SmtpServer)) 
                            throw new Exception("SmtpServer must be specified"); 
 
        SmtpClient client = new SmtpClient(this.m_SmtpServer); 
                    client.Port = this.m_Port; 
 
                    if (this.m_Username != null && this.m_Password != null) { 
                            client.UseDefaultCredentials = false; 
                            client.Credentials = new NetworkCredential(this.m_Username, this.m_Password); 
                    } 
 
        client.Send(_message); 
                    return true; 
            } 
            catch (SmtpException exc) { 
                    Trace.WriteLine(String.Format("Email could not be send.", exc)); 
                    return false; 
            } 
    }