WPF Treeview bound to an xml file monitored for changes

Here's a code snippet of a WPF treeview binding to a xml file, which gets reloaded everytime the xml file is physically changed.

The sample xml file I'm using (located at "C:\data.xml"):


The XAML code:


And finally the C# code-behind code for the same window that monitors the xml file changes and updates the binding accordingly: