Переписать на C# код Python Read Holding Registers протокола Modbus

    def read_03(self, addr, num):
        func, numbytes = 3, num * 2
        sbuff = array('c', struct.pack('BB', self.__slave, func))
        sbuff.extend(struct.pack('>HH', addr, num))
        sbuff.extend(struct.pack('<H', self.__get_CRC16(sbuff)))
        try:
            rbuff = array('c', self.__port.transceive(sbuff.tostring()))
        except IOError:
            raise ModbusDevice.error('There is no responce from device!')
 
        if len(rbuff) != numbytes + 5:
            raise ModbusDevice.error('Bad responce from device!')
        if ord(rbuff[0]) != self.__slave:
            raise ModbusDevice.error('Bad responce from device!')
        if ord(rbuff[1]) != func:
            if ord(rbuff[1]) & 127 == func:
                raise ModbusDevice.error('Exception responce from device, code %d' % (ord(rbuff[2]),))
            else:
                raise ModbusDevice.error('Bad responce from device!')
        if ord(rbuff[2]) != numbytes:
            raise ModbusDevice.error('Bad responce from device!')
        crc1, crc2 = self.__get_CRC16(rbuff[:-2]), struct.unpack('<H', rbuff[-2:].tostring())[0]
        if crc1 != crc2:
            raise ModbusDevice.error('Wrong CRC sum from device!')
        return struct.unpack('>' + 'H' * num, rbuff[3:-2])