static void subscribe(int domain_id, int sample_count)
    {
        // --- Create participant --- //

        /* To customize the participant QoS, use
         * the configuration file USER_QOS_PROFILES.xml */
        DDS.DomainParticipant participant =
            DDS.DomainParticipantFactory.get_instance().create_participant(
                domain_id,
                DDS.DomainParticipantFactory.PARTICIPANT_QOS_DEFAULT,
                null /* listener */,
                DDS.StatusMask.STATUS_MASK_NONE);

        /* If you want to change the DomainParticipant's QoS programmatically
         * rather than using the XML file, you will need to add the following lines
         * to your code and comment out the create_participant call above.
         *
         * In this case, we set the transport settings in the XML by default, but
         * in the createParticipant call, we set up the transport
         * properties either using the Properties QoS in code.
         */
        /* DDS.DomainParticipant participant = createParticipant(domain_id); */

        if (participant == null)
        {
            shutdown(participant);
            throw new ApplicationException("create_participant error");
        }

        if (checkParticipant(participant) == true)
        {
            Console.WriteLine("Ok, recv_socket_buffer_size....modified");
            Console.WriteLine("Ok, send_socket_buffer_size....modified");
        }

        // --- Create subscriber --- //

        /* To customize the subscriber QoS, use
         * the configuration file USER_QOS_PROFILES.xml */
        DDS.Subscriber subscriber = participant.create_subscriber(
            DDS.DomainParticipant.SUBSCRIBER_QOS_DEFAULT,
            null /* listener */,
            DDS.StatusMask.STATUS_MASK_NONE);
        if (subscriber == null)
        {
            shutdown(participant);
            throw new ApplicationException("create_subscriber error");
        }

        // --- Create topic --- //

        /* Register the type before creating the topic */
        System.String type_name = numbersTypeSupport.get_type_name();
        try {
            numbersTypeSupport.register_type(
                participant, type_name);
        }
        catch (DDS.Exception e) {
            Console.WriteLine("register_type error {0}", e);
            shutdown(participant);
            throw e;
        }

        /* To customize the topic QoS, use
         * the configuration file USER_QOS_PROFILES.xml */
        DDS.Topic topic = participant.create_topic(
            "Example numbers",
            type_name,
            DDS.DomainParticipant.TOPIC_QOS_DEFAULT,
            null /* listener */,
            DDS.StatusMask.STATUS_MASK_NONE);
        if (topic == null)
        {
            shutdown(participant);
            throw new ApplicationException("create_topic error");
        }

        // --- Create reader --- //

        /* Create a data reader listener */
        numbersListener reader_listener =
            new numbersListener();

        /* To customize the data reader QoS, use
         * the configuration file USER_QOS_PROFILES.xml */
        DDS.DataReader reader = subscriber.create_datareader(
            topic,
            DDS.Subscriber.DATAREADER_QOS_DEFAULT,
            reader_listener,
            DDS.StatusMask.STATUS_MASK_ALL);
        if (reader == null)
        {
            shutdown(participant);
            reader_listener = null;
            throw new ApplicationException("create_datareader error");
        }

        // --- Wait for data --- //

        /* Main loop */
        const System.Int32 receive_period = 4000; // milliseconds

        for (int count = 0;
             (sample_count == 0) || (count < sample_count);
             ++count)
        {
            Console.WriteLine(
                "numbers subscriber sleeping for {0} sec...",
                receive_period / 1000);

            System.Threading.Thread.Sleep(receive_period);
        }

        // --- Shutdown --- //

        /* Delete all entities */
        shutdown(participant);
        reader_listener = null;
    }
    static void subscribe(int domain_id, int sample_count)
    {
        // --- Create participant --- //

        /* To customize the participant QoS, use
           the configuration file USER_QOS_PROFILES.xml */
        DDS.DomainParticipant participant =
            DDS.DomainParticipantFactory.get_instance().create_participant(
                domain_id,
                DDS.DomainParticipantFactory.PARTICIPANT_QOS_DEFAULT,
                null /* listener */,
                DDS.StatusMask.STATUS_MASK_NONE);
        /* If you want to change the DomainParticipant's QoS programmatically
         * rather than using the XML file, you will need to add the following lines
         * to your code and comment out the create_participant call above.
         *
         * In this case, we set the transport settings in the XML by default, but
         * in the createParticipant call, we set up the transport
         * properties either using the Properties QoS in code.
         */
        /* DDS.DomainParticipant participant = createParticipant(domain_id); */

        if (participant == null) {
            shutdown(participant);
            throw new ApplicationException("create_participant error");
        }

        if (checkParticipant(participant) == true)
        {
            Console.WriteLine("Ok, recv_socket_buffer_size....modified");
            Console.WriteLine("Ok, send_socket_buffer_size....modified");
        }

        // --- Create subscriber --- //

        /* To customize the subscriber QoS, use
           the configuration file USER_QOS_PROFILES.xml */
        DDS.Subscriber subscriber = participant.create_subscriber(
            DDS.DomainParticipant.SUBSCRIBER_QOS_DEFAULT,
            null /* listener */,
            DDS.StatusMask.STATUS_MASK_NONE);
        if (subscriber == null) {
            shutdown(participant);
            throw new ApplicationException("create_subscriber error");
        }

        // --- Create topic --- //

        /* Register the type before creating the topic */
        System.String type_name = numbersTypeSupport.get_type_name();
        try {
            numbersTypeSupport.register_type(
                participant, type_name);
        }
        catch(DDS.Exception e) {
            Console.WriteLine("register_type error {0}", e);
            shutdown(participant);
            throw e;
        }

        /* To customize the topic QoS, use
           the configuration file USER_QOS_PROFILES.xml */
        DDS.Topic topic = participant.create_topic(
            "Example numbers",
            type_name,
            DDS.DomainParticipant.TOPIC_QOS_DEFAULT,
            null /* listener */,
            DDS.StatusMask.STATUS_MASK_NONE);
        if (topic == null) {
            shutdown(participant);
            throw new ApplicationException("create_topic error");
        }

        // --- Create reader --- //

        /* Create a data reader listener */
        numbersListener reader_listener =
            new numbersListener();

        /* To customize the data reader QoS, use
           the configuration file USER_QOS_PROFILES.xml */
        DDS.DataReader reader = subscriber.create_datareader(
            topic,
            DDS.Subscriber.DATAREADER_QOS_DEFAULT,
            reader_listener,
            DDS.StatusMask.STATUS_MASK_ALL);
        if (reader == null) {
            shutdown(participant);
            reader_listener = null;
            throw new ApplicationException("create_datareader error");
        }

        // --- Wait for data --- //

        /* Main loop */
        const System.Int32 receive_period = 4000; // milliseconds
        for (int count=0;
             (sample_count == 0) || (count < sample_count);
             ++count) {
            Console.WriteLine(
                "numbers subscriber sleeping for {0} sec...",
                receive_period / 1000);

            System.Threading.Thread.Sleep(receive_period);
        }

        // --- Shutdown --- //

        /* Delete all entities */
        shutdown(participant);
        reader_listener = null;
    }