Working with WPF TreeView Control

With C#, I recursively populated a WPF TreeView control. TreeView control will be populated with a directory listing with their respective files. The code is below:
On Page Load:

XAML:

<TreeView Name="Dir" Height="310">

</TreeView>

Initialize a recursive function call: treeViewItem(DirectoryInfo):

DirectoryInfo dir = new DirectoryInfo(@"C:\Kirk\Images");

Dir.Items.Add(treeViewItem(dir));

Recursive function:

private TreeViewItem treeViewItem(DirectoryInfo dir)

 {

     TreeViewItem tvi = new TreeViewItem();

     tvi.Header = dir.Name;

     foreach (DirectoryInfo dirInfo in dir.GetDirectories())

     {

         TreeViewItem t = treeViewItem(dirInfo);

         tvi.Items.Add(t);

     }

     IEnumerable<TextBlock> textBlock = dir.GetFiles().Select(f => new TextBlock {Text = f.Name} );

     foreach (TextBlock tb in textBlock)

     {

         tvi.Items.Add(tb);

     }

     return tvi;

 }

I use lambda expressions on any collection. Lambda expressions are extremely productive and tight.

My coding information.