Inter application communication in WinRT

Question

There are two WinRT applications (C#/Xaml if it matters) on Windows 8. The first app should receive and send some data into the second one. What the best way to do that? Can WCF

Answer 1

One thing I stumbled across is: Windows.Networking.BackgroundTransfer

Basically coming from this article: Transferring data in the background (Windows Store apps using C#/VB/C++ and XAML)

But I'm actually not through the hole article & concept of background tasks. Maybe someone can comment on this?