How to disable expanding in certain branches in TreeView (WinForms) ?

What I'm trying to implement:

I want to visualize a content of certain folder (all subfolders and files) via TreeView. And when a user clicks on file or folder in the tree - he gets the extended info (such as: size, creation date etc.) Btw, I populate my TreeView from XML-file.

Look at the screenshot.

When I make it like on the 1st picture - I can handle a user's click, read child nodes and display the extended file info. BUT this version of tree is too bulky.

The 2nd version of tree is much better looking. BUT in this case - I can't easily reach file info (size, name etc.) that I want to output to user.

So I need your advise, how to solve my problem.

All that comes to my mind: disable expansion of nodes ; make some sort of hidden fields. But I don't know how to implement it :(