You'll need to explain more about what you mean by ".NET Backend". Are you referring to an Azure backend? In that case, post to the Azure forums. Do you mean a Webservice running ASP.NET? In that case, I would recommend that you post to a Dynamics
forums to get the proper APIs.
In any case, I am thinking that it's unlikely that the Dynamics API DLLs will work in a WinRT app unless they've written one specifically for WinRT. Again, you'll need to post to the correct forum to find this information.
Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.
NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined
objects and unknown namespaces.