how to create treeview control

@model List<AdwaniMVCNew.Models.Menu>

           @{
               ViewBag.Title = "Simple";
           }

           <h2>Simple Treeview from Database Data</h2>
           <div style="border:solid 1px black; padding:10px; background-color:#FAFAFA">
               <div class="treeview">
                   @if (Model != null && Model.Count() >0)
                   {
                       <ul>
                           @Treeview.GetTreeView(Model, Model.FirstOrDefault().ParentId)
                       </ul>
                   }
               </div>
           </div>

public ActionResult Simple()
      {
          List<Menu> all = new List<Menu>();
          using (AdwaniContext db = new AdwaniContext())
          {
              all = db.Menus.OrderBy(a => a.ParentId).ToList();
          }
          return View(all);
      }