问C#独立地从2 RS232(COM-端口)读取数据

EN

class DataCollector
{

    private SerialPort _serialPort;
    List<String> Data;
    private bool _finished = false;
    private bool _handshake = true;

    public DataCollector(SerialPort serialPort, bool handshake=true)
    {
        Data = new List<String>();
        _serialPort = serialPort;

        _serialPort.DataReceived += SerialPortDataReceived;
        _handshake = handshake;
        if (_serialPort.IsOpen)
        {
            _serialPort.DiscardInBuffer();
        }
    }

    ~DataCollector()
    {
        if (_serialPort.IsOpen)
        {
            _serialPort.DiscardInBuffer();
        }
        Data.Clear();
    }

    private void SerialPortDataReceived(object sender, SerialDataReceivedEventArgs e)
    {
        if (_handshake == false)
        {

            String str =_serialPort.ReadLine();
            str.Insert(str.Length, "\n");

            Data.Add(str);


            if (Data.Count == 48)
            {
               _finished = true;
            }
        }
        else
        {
            Char readedByte = (char)_serialPort.ReadByte();
            if ((readedByte != (char)5) && Data.Count == 0)
            {

                return;
            }
            if (readedByte.CompareTo((char)2) == 0)
            {
                readLine();
                sendAck();
            }
            else if (readedByte.CompareTo((char)5) == 0)
            {

                Data.Add(((char)5).ToString());
                sendAck();
            }
            else if (readedByte == (char)4)
            {
                _finished = true;
            }
        }

        private void sendAck()
        {
            if (_serialPort.IsOpen )
            {
                Byte[] bytes = {6};
                _serialPort.Write(bytes,0,1);
            }
        }
        private void readLine(){
            String str = _serialPort.ReadLine();
            Data.Add(str);
        }
    }

_inputCollector = new DataCollector(_RS232Input);

_inputSecondCollector = new DataCollector(_RS232SecondInput, false);