Email Sending in asp.net

using System.Net;

using System.Net.Mail;

private string MailFrom = "myMail@gmail.com";

private string MailPassword = "myPassword";

public string MailSubject { get; set; }

public string MailTo { get ; set;}

public string MailBody { get; set; }

public string Attachment { get; set; }

public void SendEmail()

        { 

            SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);

            smtp.UseDefaultCredentials = false;

            smtp.Credentials = new NetworkCredential(MailFrom, MailPassword);

            MailMessage msg = new MailMessage(MailFrom, MailTo);         

            Attachment att = new Attachment (Attachment);

            msg.Attachments.Add(att);

            msg.Subject = MailSubject;

            msg.Body = MailBody;          

            msg.IsBodyHtml = true;

            smtp.EnableSsl = true;

            smtp.Send(msg);

        }