title: TreeView set Foreground and font
body: <p>I Have a control I made using Winforms some years ago, I'm trying to rewrite it using WPF.
  I'm using a Treeview (unbound) Control as my base control, I need to change the foregroug color and font-size of some items depending on values I gather. 
  I tried setting the foregroud using code :</p>
  
  <pre><code>    TreeViewItem n = new TreeViewItem();
      n.Header = item.Name;
      n.Tag = item;
      n.Foreground = new SolidColorBrush(Colors.LightGreen);
  </code></pre>
  
  <p>No luck.
  any help???</p>