I suspect the second method is just an example of how you could make an asynchronous operation that performs a subtracting of two numbers, after a method (Count

I suspect the second method is just an example of how you could make an asynchronous operation that performs a subtracting of two numbers, after a method (CountEveryBitByHand) is completed. To keep it simple they should have left out the second method. Unless I'm incredibly wrong!