public static void CreateMessageWithAttachment4(string server, string to)
        {
            // Specify the file to be attached and sent.
            // This example uses a file on a UNC share.
            string file = @"\\share3\c$\reports\data.xls";
            // Create a message and set up the recipients.
            MailMessage message = new MailMessage(
               "ReportMailer@contoso.com",
               to,
               "Quarterly data report",
               "See the attached spreadsheet.");

            // Create  the file attachment for this e-mail message.
            Attachment data = new Attachment("qtr3.xls", MediaTypeNames.Application.Octet);
            // Add time stamp information for the file.
            ContentDisposition disposition = data.ContentDisposition;
            disposition.CreationDate = System.IO.File.GetCreationTime(file);
            disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
            disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
            disposition.DispositionType = DispositionTypeNames.Attachment;
            // Add the file attachment to this e-mail message.
            message.Attachments.Add(data);
            //Send the message.
            SmtpClient client = new SmtpClient(server);
            // Add credentials if the SMTP server requires them.
            client.Credentials = (ICredentialsByHost)CredentialCache.DefaultNetworkCredentials;
            client.Send(message);
            // Display the message headers.
            string[] keys = message.Headers.AllKeys;
            Console.WriteLine("Headers");
            foreach (string s in keys)
            {
                Console.WriteLine("{0}:", s);
                Console.WriteLine("    {0}", message.Headers[s]);
            }
            data.Dispose();
        }

static void CreateMessageWithAttachment4( String^ server, String^ to )
{

   // Specify the file to be attached and sent.
   // This example uses a file on a UNC share.
   String^ file = L"\\\\share3\\c$\\reports\\data.xls";

   // Create a message and set up the recipients.
   MailMessage^ message = gcnew MailMessage( L"ReportMailer@contoso.com",to,L"Quarterly data report",L"See the attached spreadsheet." );

   // Create  the file attachment for this e-mail message.
   Attachment^ data = gcnew Attachment("qtr3.xls", MediaTypeNames::Application::Octet);

   // Add time stamp information for the file.
   ContentDisposition^ disposition = data->ContentDisposition;
   disposition->CreationDate = System::IO::File::GetCreationTime( file );
   disposition->ModificationDate = System::IO::File::GetLastWriteTime( file );
   disposition->ReadDate = System::IO::File::GetLastAccessTime( file );
   disposition->DispositionType = DispositionTypeNames::Attachment;

   // Add the file attachment to this e-mail message.
   message->Attachments->Add( data );

   //Send the message.
   SmtpClient^ client = gcnew SmtpClient( server );

   // Add credentials if the SMTP server requires them.
   client->Credentials = dynamic_cast<ICredentialsByHost^>(CredentialCache::DefaultNetworkCredentials);
   client->Send( message );

   // Display the message headers.
   array<String^>^keys = message->Headers->AllKeys;
   Console::WriteLine( L"Headers" );
   IEnumerator^ myEnum3 = keys->GetEnumerator();
   while ( myEnum3->MoveNext() )
   {
      String^ s = safe_cast<String^>(myEnum3->Current);
      Console::WriteLine( L"{0}:", s );
      Console::WriteLine( L"    {0}", message->Headers[ s ] );
   }

   data->~Attachment();
   client->~SmtpClient();
}

public static void CreateMessageWithAttachment4(String server, String to)
{
    // Specify the file to be attached and sent.
    // This example uses a file on a UNC share.
    String file = "\\\\share3\\c$\\reports\\data.xls";
    // Create a message and set up the recipients.
    MailMessage message = new MailMessage(
        "ReportMailer@contoso.com", to, "Quarterly data report", 
        "See the attached spreadsheet.");

    // Create  the file attachment for this e-mail message.
    Attachment data = new Attachment("qtr3.xls", MediaTypeNames.Application.Octet);
    // Add time stamp information for the file.
    ContentDisposition disposition = data.get_ContentDisposition();
    disposition.set_CreationDate(System.IO.File.GetCreationTime(file));
    disposition.set_ModificationDate(System.IO.File.GetLastWriteTime(file));
    disposition.set_ReadDate(System.IO.File.GetLastAccessTime(file));
    disposition.set_DispositionType(DispositionTypeNames.Attachment);
    // Add the file attachment to this e-mail message.
    message.get_Attachments().Add(data);
    //Send the message.
    SmtpClient client = new SmtpClient(server);
    // Add credentials if the SMTP server requires them.
    client.set_Credentials((ICredentialsByHost)(
        CredentialCache.get_DefaultNetworkCredentials()));
    client.Send(message);
    // Display the message headers.
    String keys[] = message.get_Headers().get_AllKeys();
    Console.WriteLine("Headers");
    for (int iCtr = 0; iCtr < keys.length; iCtr++) {
        String s = keys[iCtr];
        Console.WriteLine("{0}:", s);
        Console.WriteLine("    {0}", message.get_Headers().get_Item(s));
    }
    data.Dispose();
} //CreateMessageWithAttachment4