Reactive-Extensions/Rx.NET — pull request #7 by paulcbetts (2014-04-24 00:30:04+00:00)
Title: Don't warn on blocking operations on Desktop CLR

First() and friends should only be deprecated on platforms where you *must* await everything (i.e. WinRT and WP8). If you're developing for a Desktop OS, it's entirely reasonable to block, especially in a unit test runner.

I originally submitted this to CodePlex but it doesn't seem to get much traction