public async Task BlobOpenWriteTestAsync()
        {
            byte[]             buffer    = GetRandomBuffer(2 * 1024);
            CloudBlobContainer container = GetRandomContainerReference();

            try
            {
                await container.CreateAsync();

                CloudPageBlob blob = container.GetPageBlobReference("blob1");
                using (ICloudBlobStream blobStream = await blob.OpenWriteAsync(2048))
                {
                    Stream blobStreamForWrite = blobStream.AsStreamForWrite();
                    await blobStreamForWrite.WriteAsync(buffer, 0, 2048);

                    await blobStreamForWrite.FlushAsync();

                    byte[]       testBuffer = new byte[2048];
                    MemoryStream dstStream  = new MemoryStream(testBuffer);
                    await blob.DownloadRangeToStreamAsync(dstStream.AsOutputStream(), null, null);

                    MemoryStream memStream = new MemoryStream(buffer);
                    TestHelper.AssertStreamsAreEqual(memStream, dstStream);
                }
            }
            finally
            {
                container.DeleteIfExistsAsync().AsTask().Wait();
            }
        }
        public async Task BlobOpenReadWriteTestAsync()
        {
            byte[]             buffer    = GetRandomBuffer(2 * 1024);
            CloudBlobContainer container = GetRandomContainerReference();

            try
            {
                await container.CreateAsync();

                CloudPageBlob blob = container.GetPageBlobReference("blob1");

                using (ICloudBlobStream blobStream = await blob.OpenWriteAsync(2048))
                {
                    Stream blobStreamForWrite = blobStream.AsStreamForWrite();
                    await blobStreamForWrite.WriteAsync(buffer, 0, 2048);

                    await blobStreamForWrite.FlushAsync();
                }

                using (IInputStream dstStream = await blob.OpenReadAsync())
                {
                    Stream       dstStreamForRead = dstStream.AsStreamForRead();
                    MemoryStream memoryStream     = new MemoryStream(buffer);
                    TestHelper.AssertStreamsAreEqual(memoryStream, dstStreamForRead);
                }
            }
            finally
            {
                container.DeleteIfExistsAsync().AsTask().Wait();
            }
        }