How do I loop through all layers of Treeview nodes?

Question

Read EDIT 2 first

I am trying to set up some way to visually distinguish the nodes in a winform app. For example, alternating colors.

Can some one start me down that path? Also, has anyone else had to do that before and how did you do it?

Thanks

EDIT

I had seen the backcolor setting as well(Thank You) but I am having trouble getting it to work. I do not see a Paint() event for treeviews. I tried putting the below code in my Form Load() but it isn't working. Possibly because the treeview is loaded yet??

        private void frmCaseNotes_Load(object sender, System.EventArgs e)
    {
        foreach (TreeNode treeNode in treeView1.Nodes[0].Nodes)
        {
            treeNode.BackColor = Color.DeepSkyBlue;
        }
    }

EDIT 2

Okay, I have the initial problem out of the way using the below on Form_Load()

            foreach (TreeNode treeNode in treeView1.Nodes)
        {
            if (treeNode.Index % 2 == 0)
            {
                 treeNode.ForeColor = Color.DodgerBlue;
            }
            else
            {
                treeNode.ForeColor = Color.Goldenrod;
            }

Now what I need to figure out, with someone's help, is how to Loop through ALL layers of nodes and apply my alternating coloring. If I do something along the below lines I can achieve this.

            foreach (TreeNode treeNode in treeView1.Nodes[1].Nodes[0].Nodes)
        {
            if (treeNode.Index % 2 == 0)
            {
                 treeNode.ForeColor = Color.DodgerBlue;
            }
            else
            {
                treeNode.ForeColor = Color.Goldenrod;
            }

How do I iterate through ALL layers programatically?

Answer 1

Recursion?

Edit: added code for eliminating color repetition

protected void ColorNodes(TreeNode root, Color firstColor, Color secondColor)
{
   Color nextColor;
   foreach (TreeNode childNode in root.Nodes)
   {     
      nextColor = childNode.ForeColor = childNode.Index % 2 == 0 ? firstColor : secondColor;

      if (childNode.Nodes.Count > 0)
      {
         // alternate colors for the next node
         if (nextColor == firstColor)
              ColorNodes(childNode, secondColor, firstColor);
         else
              ColorNodes(childNode, firstColor, secondColor);
      }
   }
}

  private void frmCaseNotes_Load(object sender, System.EventArgs e)
    {
       foreach (TreeNode rootNode in treeView1.Nodes)
       {
          ColorNodes(rootNode, Color.Goldenrod, Color.DodgerBlue);
       }
    }