Azure Blob storage: DownloadToByteArray VS DownloadToStream

Question

I have been playing with the Azure Blob Storage service to save/recover files in a context of a web page to be hosted in Azure Web Pages.

During the learning process I h

Answer 1

If you are planning to use the DownloadToBytesArray (async or not), you will have to fetch blob attributes first to get an initial size of byte array.

And if you will be using DownloadToStream you will not have to do that. That's one saved HTTP call to the blob storage and if I am not mistaken, FetchAttributes() is executed as HTTP HEAD request and that will count as a normal transaction (it will cost you some money in other words).