Graph Tree Custom Layout Style for WPF TreeView Control

My day job is mostly working in C++ with a bit of C#. I write a fair amount of command line based tools and really wish they could have a GUI front-end to them hence why I spend my spare time working with WPF.
 
I started a blog few years back but didn't do a lot with it. I've started describing some of the interesting programming things I come across on it. Please take a look.