private async Task <IEnumerable <QueueMessage> > ReceiveMessagesWithLinearBackOffAsync()
{
var currentBackOffInSeconds = 0;
var messages = new QueueMessage[0];
while (!messages.Any())
{
await Task.Delay(TimeSpan.FromSeconds(Math.Min(currentBackOffInSeconds++, _maximumBackOffDurationInSeconds)), _cancellationToken);
messages = (await _queueClient.ReceiveMessagesAsync(_maximumReceiveBatchSize, TimeSpan.FromSeconds(_invisibilityTimeoutInSeconds), _cancellationToken)).Value;
}
return(messages);
}