public async Task <(Stream Stream, FileMetadata Metadata)> DownloadAsync(string blobName)
{
var client = CreateBlockClient(blobName);
var blob = await client.DownloadAsync();
var properties = await client.GetPropertiesAsync();
var result = (Stream : blob.Value.Content, Metadata : FileMetadata.FromStorageMetadata(properties.Value.Metadata));
return(result);
}