public void CloudBlockBlobDownloadToStreamAPMCancel()
        {
            byte[]             buffer    = GetRandomBuffer(1 * 1024 * 1024);
            CloudBlobContainer container = GetRandomContainerReference();

            try
            {
                container.Create();

                CloudBlockBlob blob = container.GetBlockBlobReference("blob1");
                using (MemoryStream originalBlob = new MemoryStream(buffer))
                {
                    using (AutoResetEvent waitHandle = new AutoResetEvent(false))
                    {
                        ICancellableAsyncResult result = blob.BeginUploadFromStream(originalBlob,
                                                                                    ar => waitHandle.Set(),
                                                                                    null);
                        waitHandle.WaitOne();
                        blob.EndUploadFromStream(result);

                        using (MemoryStream downloadedBlob = new MemoryStream())
                        {
                            OperationContext operationContext = new OperationContext();
                            result = blob.BeginDownloadToStream(downloadedBlob, null, null, operationContext,
                                                                ar => waitHandle.Set(),
                                                                null);
                            Thread.Sleep(100);
                            result.Cancel();
                            waitHandle.WaitOne();
                            try
                            {
                                blob.EndDownloadToStream(result);
                            }
                            catch (StorageException ex)
                            {
                                Assert.AreEqual(ex.Message, "Operation was canceled by user.");
                                Assert.AreEqual(ex.RequestInformation.HttpStatusCode, 306);
                                Assert.AreEqual(ex.RequestInformation.HttpStatusMessage, "Unused");
                            }
                            TestHelper.AssertNAttempts(operationContext, 1);
                        }
                    }
                }
            }
            finally
            {
                container.DeleteIfExists();
            }
        }
        public static async Task <string> DownloadToString(this CloudBlockBlob blob)
        {
            using (var strm = new MemoryStream())
            {
                await
                Task.Factory.FromAsync((cb, state) => blob.BeginDownloadToStream(strm, cb, state),
                                       ar => blob.EndDownloadToStream(ar),
                                       state : null);

                await strm.FlushAsync();

                strm.Seek(0, SeekOrigin.Begin);
                return(await new StreamReader(strm).ReadToEndAsync());
            }
        }
        public void CloudBlockBlobDownloadToStreamAPMRetry()
        {
            byte[]             buffer    = GetRandomBuffer(1 * 1024 * 1024);
            CloudBlobContainer container = GetRandomContainerReference();

            try
            {
                container.Create();

                CloudBlockBlob blob = container.GetBlockBlobReference("blob1");
                using (MemoryStream originalBlob = new MemoryStream(buffer))
                {
                    using (AutoResetEvent waitHandle = new AutoResetEvent(false))
                    {
                        ICancellableAsyncResult result = blob.BeginUploadFromStream(originalBlob,
                                                                                    ar => waitHandle.Set(),
                                                                                    null);
                        waitHandle.WaitOne();
                        blob.EndUploadFromStream(result);

                        using (MemoryStream downloadedBlob = new MemoryStream())
                        {
                            Exception manglerEx = null;
                            using (HttpMangler proxy = new HttpMangler(false,
                                                                       new[]
                            {
                                TamperBehaviors.TamperNRequestsIf(
                                    session => ThreadPool.QueueUserWorkItem(state =>
                                {
                                    Thread.Sleep(1000);
                                    try
                                    {
                                        session.Abort();
                                    }
                                    catch (Exception e)
                                    {
                                        manglerEx = e;
                                    }
                                }),
                                    2,
                                    AzureStorageSelectors.BlobTraffic().IfHostNameContains(container.ServiceClient.Credentials.AccountName))
                            }))
                            {
                                OperationContext operationContext = new OperationContext();
                                result = blob.BeginDownloadToStream(downloadedBlob, null, null, operationContext,
                                                                    ar => waitHandle.Set(),
                                                                    null);
                                waitHandle.WaitOne();
                                blob.EndDownloadToStream(result);
                                TestHelper.AssertStreamsAreEqual(originalBlob, downloadedBlob);
                            }

                            if (manglerEx != null)
                            {
                                throw manglerEx;
                            }
                        }
                    }
                }
            }
            finally
            {
                container.DeleteIfExists();
            }
        }