public void AddSettingsPage(ISettingsPage page, SettingsPageReference parentPageReference)
{
TreeNode node;
if (parentPageReference == null)
node = treeView1.Nodes.Add(page.GetTitle());
else
{
TreeNode parentNode;
if (!_Pages2NodeMap.TryGetValue(parentPageReference, out parentNode))
throw new ArgumentException("You have to add parent page first: " + parentPageReference.ToString());
node = parentNode.Nodes.Add(page.GetTitle());
}
node.Tag = page;
_Pages2NodeMap.Add(page.PageReference, node);
_SettingsPages.Add(page);
}