how to hook into tree menus in V7

gistfile1.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Umbraco.Core;

namespace Meh.App_Code
{
    public class ChangeMenu : ApplicationEventHandler
    {
        protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {
            Umbraco.Web.Trees.ContentTreeController.MenuRendering += ContentTreeController_MenuRendering;
        }

        void ContentTreeController_MenuRendering(Umbraco.Web.Trees.TreeControllerBase sender, Umbraco.Web.Trees.MenuRenderingEventArgs e)
        {
	    //creates a menu action that will open /umbraco/currentSection/itemAlias.html
            var i = new Umbraco.Web.Models.Trees.MenuItem("itemAlias", "Item name");
            
            //optional, if you want to load a legacy page, otherwise it will just follow convention
            i.AdditionalData.Add("actionUrl", "my/long/url/to/webformshorror.aspx");
            
            //optional, if you dont want to follow conventions, but do want to use a angular view
            i.AdditionalData.Add("actionView", "my/long/url/to/view.html");
            
	    //sets the icon to icon-wine-glass 
	    i.Icon = "wine-glass"

   	    //insert at index 5
            e.Menu.Items.Insert(5,i);
        }
    }
}