WithCallbackStream is not invoked when add WithFile

[maxwell60701]

var args = new GetObjectArgs() .WithBucket(bucketName) .WithObject(objectName) .WithFile(fileName) .WithCallbackStream(stream => {});
If I add WithFile method, the callback WithCallbackStream is not invoked.
I saw the source code,there is a property Callback in class GetObjectArgs has been replaced when I add WithFile method,Could I download the file and get the stream at the same time?