public void ToString_ReadWriteMultipleRegistersRequest()
        {
            RegisterCollection writeCollection        = new RegisterCollection(255, 255, 255);
            ReadWriteMultipleRegistersRequest request = new ReadWriteMultipleRegistersRequest(5, 3, 6, 14,
                                                                                              writeCollection);

            Assert.Equal(
                "Write 3 holding registers starting at address 14, and read 6 registers starting at address 3.",
                request.ToString());
        }