private void DoUploadFromByteArrayTest(CloudFile file, int bufferSize, int bufferOffset, int count, bool isAsync)
        {
            byte[] buffer = GetRandomBuffer(bufferSize);
            byte[] downloadedBuffer = new byte[bufferSize];
            int downloadLength;

            if (isAsync)
            {
                IAsyncResult result;
                using (AutoResetEvent waitHandle = new AutoResetEvent(false))
                {
                    result = file.BeginUploadFromByteArray(buffer, bufferOffset, count,
                        ar => waitHandle.Set(),
                        null);
                    waitHandle.WaitOne();
                    file.EndUploadFromByteArray(result);

                    result = file.BeginDownloadToByteArray(downloadedBuffer, 0,
                        ar => waitHandle.Set(),
                        null);
                    waitHandle.WaitOne();
                    downloadLength = file.EndDownloadToByteArray(result);
                }
            }
            else
            {
                file.UploadFromByteArray(buffer, bufferOffset, count);
                downloadLength = file.DownloadToByteArray(downloadedBuffer, 0);
            }

            Assert.AreEqual(count, downloadLength);

            for (int i = 0; i < count; i++)
            {
                Assert.AreEqual(buffer[i + bufferOffset], downloadedBuffer[i]);
            }
        }
        /// <summary>
        /// Single put file and get file
        /// </summary>
        /// <param name="fileSize">The file size.</param>
        /// <param name="bufferOffset">The file offset.</param>
        /// <param name="option"> 0 - Sunc, 1 - APM and 2 - APM overload.</param>
        private void DoDownloadToByteArrayTest(CloudFile file, int fileSize, int bufferSize, int bufferOffset, int option)
        {
            int downloadLength;
            byte[] buffer = GetRandomBuffer(fileSize);
            byte[] resultBuffer = new byte[bufferSize];
            byte[] resultBuffer2 = new byte[bufferSize];

            using (MemoryStream originalFile = new MemoryStream(buffer))
            {
                if (option == 0)
                {
                    file.UploadFromStream(originalFile);
                    downloadLength = file.DownloadToByteArray(resultBuffer, bufferOffset);
                }
                else if (option == 1)
                {
                    using (AutoResetEvent waitHandle = new AutoResetEvent(false))
                    {
                        ICancellableAsyncResult result = file.BeginUploadFromStream(originalFile,
                            ar => waitHandle.Set(),
                            null);
                        waitHandle.WaitOne();
                        file.EndUploadFromStream(result);

                        result = file.BeginDownloadToByteArray(resultBuffer,
                            bufferOffset,
                            ar => waitHandle.Set(),
                            null);
                        waitHandle.WaitOne();
                        downloadLength = file.EndDownloadToByteArray(result);
                    }
                }
                else
                {
                    using (AutoResetEvent waitHandle = new AutoResetEvent(false))
                    {
                        ICancellableAsyncResult result = file.BeginUploadFromStream(originalFile,
                            ar => waitHandle.Set(),
                            null);
                        waitHandle.WaitOne();
                        file.EndUploadFromStream(result);

                        OperationContext context = new OperationContext();
                        result = file.BeginDownloadToByteArray(resultBuffer,
                            bufferOffset, /* offset */
                            null, /* accessCondition */
                            null, /* options */
                            context, /* operationContext */
                            ar => waitHandle.Set(),
                            null);
                        waitHandle.WaitOne();
                        downloadLength = file.EndDownloadToByteArray(result);
                    }
                }

                int downloadSize = Math.Min(fileSize, bufferSize - bufferOffset);
                Assert.AreEqual(downloadSize, downloadLength);

                for (int i = 0; i < file.Properties.Length; i++)
                {
                    Assert.AreEqual(buffer[i], resultBuffer[bufferOffset + i]);
                }

                for (int j = 0; j < bufferOffset; j++)
                {
                    Assert.AreEqual(0, resultBuffer2[j]);
                }

                if (bufferOffset + fileSize < bufferSize)
                {
                    for (int k = bufferOffset + fileSize; k < bufferSize; k++)
                    {
                        Assert.AreEqual(0, resultBuffer2[k]);
                    }
                }
            }
        }