Treeview rekursiv durchsuchen

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TreeNode FindNode (TreeNodeCollection tncoll, String strText)
{
   TreeNode tnFound;
   foreach (TreeNode tnCurr in tncoll) {
      if (tnCurr.Text.StartsWith (strText)) {
         return tnCurr;
      }
      tnFound = FindNode (tnCurr.Nodes, strText);
      if (tnFound != null) {
         return tnFound;
      }
   }
   return null;
}

// Beispielaufruf
void SearchTextChanged (Object objSender, EventArgs ea)
{
   _tvDir.SelectedNode = FindNode (_tvDir.Nodes, _tbxSearch.Text);
}