private static void CreateForTest(CloudBlockBlob blob, int blockCount, int blockSize, bool isAsync, bool commit = true)
        {
            byte[] buffer = GetRandomBuffer(blockSize);
            List<string> blocks = GetBlockIdList(blockCount);

            using (AutoResetEvent waitHandle = new AutoResetEvent(false))
            {
                foreach (string block in blocks)
                {
                    using (MemoryStream stream = new MemoryStream(buffer))
                    {
                        if (isAsync)
                        {
                            IAsyncResult result = blob.BeginPutBlock(block, stream, null,
                                ar => waitHandle.Set(),
                                null);
                            waitHandle.WaitOne();
                            blob.EndPutBlock(result);
                        }
                        else
                        {
                            blob.PutBlock(block, stream, null);
                        }
                    }
                }

                if (commit)
                {
                    if (isAsync)
                    {
                        IAsyncResult result = blob.BeginPutBlockList(blocks,
                            ar => waitHandle.Set(),
                            null);
                        waitHandle.WaitOne();
                        blob.EndPutBlockList(result);
                    }
                    else
                    {
                        blob.PutBlockList(blocks);
                    }
                }
            }
        }