ASP.Net/Session Cookie/Application Error

In case of application error send out email (VB.net)

   <source lang="csharp">

<%@ Import Namespace="System.Web.Mail" %> <script language="VB" runat="server">

  Sub Application_Error(sender As Object, e As EventArgs)
     Dim ex As Exception = Server.GetLastError()
     If Not ex Is Nothing Then
        Dim Mail as New MailMessage()
        "Change the values below to valid email addresses
        "Mail.To = <valid email address>
        "Mail.From = <valid email address>
        Mail.Subject = "error"
        Mail.Body = "An Exception occurred in page " & _
           Request.RawUrl & ":" & vbCrLf
        Mail.Body &= ex.ToString() & vbCrlf & vbCrlf
        Mail.Body &= "was handled from Application_Error."
        "If your SMTP server is not local, change the property below
        "   to a valid server or domain name for the SMTP server
        SmtpMail.SmtpServer = "localhost"
        SmtpMail.Send(Mail)
        Server.ClearError()
     End If
  End Sub

</script>

      </source>