kendo ui menu dynamic - ASP.NET MVC

Model Class

public class DynamicMenu
{
    public int MenuID { get; set; }
    public string MenuName { get; set; }
    public int ParentMenuID { get; set; }
}

Controller Code

public ActionResult Menu()
{
     ViewData["DynamicMenu"] = new List<DynamicMenu> {
            new DynamicMenu{ MenuID = 1, MenuName = "Self", ParentMenuID = 0 },
            new DynamicMenu{ MenuID = 2, MenuName = "Functional", ParentMenuID = 0  },
            new DynamicMenu{ MenuID = 3, MenuName = "Leave", ParentMenuID = 1 },
            new DynamicMenu{ MenuID = 4, MenuName = "Leave Application", ParentMenuID = 3 },
            new DynamicMenu{ MenuID = 5, MenuName = "Delete Application", ParentMenuID = 4 }
        };

    return View();
}

View Code

@{
    ViewBag.Title = "Dynamic Menu";
    List<DynamicMenu> dynamicMenu = (List<DynamicMenu>)ViewData["DynamicMenu"];
}
<h4>
    Dynamic - Menu</h4>
<div>
    @using Kendo.Mvc.UI.Fluent
    @functions{
        public void addChildren(MenuItemBuilder builder, DynamicMenu item, IEnumerable<DynamicMenu> items)
        {
            var children = items.Where(m => m.ParentMenuID == item.MenuID);
            if (children != null)
            {
                builder.Items(menuItems =>
                    {
                        foreach (var child in children)
                        {
                            var menuItem = menuItems.Add().Text(child.MenuName);
                            addChildren(menuItem, child, items);
                        }
                    });

            }
        }
    }
    @(Html.Kendo().Menu()
    .Name("menu3")
    .Items(menu =>
    {
        foreach (var item in dynamicMenu.Where(m => m.ParentMenuID == 0))
        {
            var builder = menu.Add().Text(item.MenuName);
            addChildren(builder, item, dynamicMenu);
        }
    }))
</div>