How can I make a nautilus-like sidebar using mono gtk#

I have been looking for weeks for a way to do this:

Screenshot http://img229.imageshack.us/img229/2430/screenshoteor.png

I am working on a music player, and would like something like this:

 Library           >
   Music          (6)
   Videos         (2)
 Playlists         >
   new playlist...

And so on. I am using mono and gtk#. I can't find a tutorial or anything, if someone could help me find one or give me an example that would be nice. Thanks!

Solution

You've to use the gtk treeview. This is the tutorial: http://www.mono-project.com/GtkSharp_TreeView_Tutorial

Bye