TimePeriodSubtractor stack overflow exception

[hubert-wojtowicz]

you can find source code where problem occure here:
https://github.com/hubert-wojtowicz/Experiments/tree/master/%5BC%23-periods%5D/ConsoleApp1

[lazda]

Look at line Nr31. Adding empty collection to itself is bad idea. If you add timeRangeBase, then all good.