1:  protected void btnSend_Click(object sender, EventArgs e)

   2:  {

   3:      if (Page.IsValid)

   4:      {

   5:          string fileName = Server.MapPath("ContactForm.txt");

   6:          string mailBody = string.Empty;

   7:          if (Cache["ContactFormMailBody"] == null)

   8:          {

   9:              mailBody = System.IO.File.ReadAllText(fileName);

  10:              Cache.Insert("ContactFormMailBody", mailBody, new CacheDependency(fileName));

  11:          }

  12:          else

  13:          {

  14:              mailBody = Cache["ContactFormMailBody"].ToString() + "\r\n(File from the cache)";

  15:          }

  16:   

  17:          mailBody = mailBody.Replace("##Name##", txtName.Text);

  18:          mailBody = mailBody.Replace("##Email##", txtEmailAddress.Text);

  19:          mailBody = mailBody.Replace("##HomePhone##", txtPhoneHome.Text);

  20:          mailBody = mailBody.Replace("##BusinessPhone##", txtPhoneBusiness.Text);

  21:          mailBody = mailBody.Replace("##Comments##", txtComments.Text);

  22:   

  23:          MailMessage myMessage = new MailMessage();

  24:          myMessage.Subject = "Response from web site";

  25:          myMessage.Body = mailBody;

  26:   

  27:          myMessage.From = new MailAddress("email@doamin.ext");

  28:          myMessage.To.Add(new MailAddress("web@doamin.ext"));

  29:          lblMessage.Text = "Your message has been sent to us";

  30:          SmtpClient mySmtpClient = new SmtpClient();

  31:          try

  32:          {

  33:              mySmtpClient.Send(myMessage);            

  34:          }

  35:          catch (Exception )

  36:          {

  37:              lblMessage.Text = "An error occurred while sending your e-mail. Please try again.";

  38:          }

  39:   

  40:          lblMessage.Visible = true;

  41:          FormTable.Visible = false;

  42:          System.Threading.Thread.Sleep(5000);

  43:      }

  44:  }

  45: