WPF App Local in WPF vNext

Question

I came across this article today, thought some people here would probably be interested.
http://www.infoq.com/news/2015/04/WPF-App-Local
In WPF vNext, the plan is to offer an “App Local” version of WPF via NuGet. This is essentially the same distribution plan currently used by ASP.NET MVC. Key features include:
Each application ships with its own version of WPF
Similar, and often much better, performance characteristics
Built on top of .NET Framework for Desktop, not necessarily .NET Core
Highly compatible with the inbox version
Self contained install. Yum.
(Much) better performance. Yum.
New templates could be good as well,  some of the hard coded aspects of win8 templates are annoying.
Hope that helps.
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Answer 1

You shouldn't rely on the user creating files in a folder structure in program files. Amongst other issues you will find most users don't have rights to create new files there.
You should be using appdata.
I recommend a folder with the same name as the namespace of your application.
I get that name like this:
public static class AppData
public static string Location = Path.Combine(Environment.GetFolderPath(
Environment.SpecialFolder.ApplicationData),
System.Reflection.Assembly.GetExecutingAssembly().EntryPoint.DeclaringType.Namespace);
Usage
private void Application_Exit(object sender, ExitEventArgs e)
var fileName = Path.Combine(AppData.Location, "FontDetails.xml");
if (!Directory.Exists(AppData.Location))
Directory.CreateDirectory(AppData.Location);
FontDetails fd = Application.Current.Resources["FontDetails"] as FontDetails;
DataContractSerializer ser = new DataContractSerializer(typeof(FontDetails));
var xmlSettings = new XmlWriterSettings { Indent = true, IndentChars = "\t" };
using (var writer = XmlWriter.Create(fileName, xmlSettings))
ser.WriteObject(writer, fd);
This sample uses that approach:
https://gallery.technet.microsoft.com/WPF-Dynamic-Fonts-ad3741ca
Hope that helps.
Technet articles: Uneventful MVVM;
All my Technet Articles