title: How to search child nods in a treeview
body: <p>I tride it in this way,</p>
  
  <pre><code>private void btnFind_Click(object sender, EventArgs 
  {
      for (int i = 0; i &lt; treeView1.Nodes.Count - 1; i++)
      {
          MessageBox.Show(i.ToString());
          treeView1.Nodes[i].BackColor = Color.Empty;
      }
      var result = from TreeNode node in treeView1.Nodes
                   where node.Text.Contains( Convert.ToString(txtFind.Text))
                   select node.Index;
  
      foreach (int search in result)
      {
          treeView1.Nodes[search].BackColor = Color.Yellow;
      }
  }
  </code></pre>
  
  <p>But in this way I can find only parent nodes. Is there a proper way to do this</p>