BrickPi.Brick.ReadAsync C# (CSharp) Method

        private async Task<byte[]> ReadAsync(int timeout, CancellationToken cancellationToken)
        {
            try
            {
                Task<UInt32> loadAsyncTask;

                uint ReadBufferLength = 1024;

                // If task cancellation was requested, comply
                //cancellationToken.ThrowIfCancellationRequested();
                if (dataReaderObject == null)
                    dataReaderObject = new DataReader(serialPort.InputStream);
                // Set InputStreamOptions to complete the asynchronous read operation when one or more bytes is available
                dataReaderObject.InputStreamOptions = InputStreamOptions.ReadAhead;
                // set serial timeout for reading. initialize the timout reading function
                serialPort.ReadTimeout = TimeSpan.FromMilliseconds(timeout);
                //await Task.Delay(timeout);
                // Create a task object to wait for data on the serialPort.InputStream
                loadAsyncTask = dataReaderObject.LoadAsync(ReadBufferLength).AsTask(cancellationToken);
                // Launch the task and wait
                UInt32 bytesRead = await loadAsyncTask;
                byte[] retval = null;
                if (bytesRead > 0)
                {
                    retval = new byte[bytesRead];
                    dataReaderObject.ReadBytes(retval); //return the bytes read
                    //Debug.WriteLine(String.Format("Bytes received successfully: {0}", bytesRead));
                }
                else
                    Debug.WriteLine(String.Format("No bytes received successfully"));
                return retval;
            }
            catch (Exception)
            {
                // Cleanup once complete
                if (dataReaderObject != null)
                {
                    dataReaderObject.DetachStream();
                    dataReaderObject = null;
                }
                Debug.WriteLine("Exception in reading");
                return null;
            }

        }