reactiveX vs Async

[Joseph L. Casale]

> Try these links on for size:
>
> https://msdn.microsoft.com/en-us/library/hh242982(v=vs.103).aspx which links to
> https://msdn.microsoft.com/en-us/library/hh242983(v=vs.103).aspx near the end.

These two SO threads have a variation of pretty good explanations:

http://stackoverflow.com/questions/2550763/good-example-of-reactive-extensions-use
http://stackoverflow.com/questions/1596158/good-introduction-to-the-net-reactive-framework