I know a number of people are interested in universal apps and how/if CSLA supports them.
First, I'm working on adding Windows Phone WinRT 8.1 support and that should be available in a couple weeks. We already support WinRT on Windows 8.1.
I've done some testing with universal apps, and with the broader concept of the shared code project tooling Microsoft added to support universal apps.
In terms of actual universal apps (WinRT on Win8.1 and WP8.1) that'll work exactly as expected once the WP8.1 support for CSLA is in nuget. You'll create your universal project (solution actually) and reference CSLA via nuget in both UI projects. Then you'll write your common code in the shared code project and everything will work just like it does with every other nuget package that supports both platforms.
(the only caveat is that WinRT on WP8.1 doesn't support WCF, so you'll need to use the new HttpProxy data portal channel I've created to overcome this limitation)
In terms of broader use of shared code projects, this is pretty cool (to say the least).
It turns out that what Microsoft has done with these shared code projects is to create a really easy way to link code files from one project into other projects. This is _exactly_ what we've all been doing with manual file linking over the past many years, but automated.
This works with any type of project.
As a result, you can use a shared code project and reference it from UI projects such as Windows Forms, WPF, WinRT, Android, iOS, etc.
What this means is that you can use the same file linking technique I've been talking about and using for all these years, but in a much simpler way - the result being that you can create one set of business class code and reuse that same code easily in numerous client projects, such as:
I put Windows Forms/WPF in there in particular, because most people are currently using those technologies. If all you do is shift your business classes into a shared code project you can keep your app working as it is today - no actual code changes.
BUT when you want to create an Android or iOS client using Xamarin you'll be all ready to link in your existing class files as you build the new client apps.
And if you want to support WinRT the same thing is true - just reference the shared code project from your WinRT project(s) and you are all set.
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