How can I convert stream to byte and byte to stream

Question

I got a IInputStream from BackgroundDownloader operation, how can I convert it to byte array? I try to convert it to buffer and after that to bytes, but it's always throw exception.
function decryptStream(inputStream, totalBytes) {
var reader = new Windows.Storage.Streams.DataReader(inputStream);
var iBuffer = reader.readBuffer(totalBytes);
var bytes = Windows.Security.Cryptography.CryptographicBuffer.copyToByteArray(iBuffer);
Could I have examples about that?

Answer 1

Hi Jeft,
In my program, I have a BackgroundDownloader to download an image. When we have result, I will convert it to bytes array.
if (p.hasResponseChanged && imageStream == null) {
imageStream = operation.getResultStreamAt(0);
if (!p.hasResponseChanged && imageStream != null) {
decryptStream(imageStream, p['bytesReceived']);