public override async Task <AsyncDisposableValue <Stream> > OpenReadAsync(CancellationToken cancellationToken = new CancellationToken())
{
if (!await BlockBlob.ExistsAsync(cancellationToken))
{
throw new ResourceNotFoundException("Metadata not found for this store");
}
cancellationToken.ThrowIfCancellationRequested();
var stream = await BlockBlob.OpenReadAsync(cancellationToken);
return(new AsyncDisposableValue <Stream>(stream, async() => stream.Dispose()));
}
