var _serialPort = new SerialPortInput(isVirtualPort);
_serialPort.SetPort(port, baudRate);
_serialPort.ConnectionStatusChanged += SerialPort_ConnectionStatusChanged;
_serialPort.MessageReceived += SerialPort_MessageReceived;

  public bool OpenConnection()
  {
      if (!_serialPort.IsConnected)
      {
          return _serialPort.Connect();
      }
      else
          return false;
  }
  
  public void CloseConnection()
  {
      if (_serialPort != null)
      {
          _serialPort.Disconnect();
      }
      _buffer = string.Empty;
  }      
  
  public bool write(byte[] packet)
  {
      return _serialPort.SendMessage(packet);
  }
  
  private void SerialPort_MessageReceived(object sender, MessageReceivedEventArgs args)
  {
      _buffer += Encoding.ASCII.GetString(args.Data);
      *Do something*
  }
  private void SerialPort_ConnectionStatusChanged(object sender, ConnectionStatusChangedEventArgs args)
  {
      if (OnConnecting != null)
          OnConnecting(this, new StateDeviceEventArgs(args.Connected));
  }