Both the System.Reactive extension for .NET and new C# 5.0 (.NET 4.5) async/await pursue (or based on) future and promises constructs paradigm (approach).
Can you gi
They're not mutually exclusive. The main determination is whether you have a single future result or multiple future results.
http://blogs.msdn.com/b/rxteam/archive/2012/03/12/reactive-extensions-v2-0-beta-available-now.aspx
http://blogs.msdn.com/cfs-filesystemfile.ashx/__key/communityserver-blogs-components-weblogfiles/00-00-01-31-75-metablogapi/0815.image_5F00_thumb_5F00_59BBA077.png