Razor code for Multi Menu Recursion

razor_recursion_kooboo.cshtml

<div class="container">
  <ul class="main-Menu">
    @foreach (var item in MenuHelper.Top())
    {
    	@ShowTree(item);
    }
    
  </ul>
</div>
@helper ShowTree(Kooboo.CMS.Sites.Models.Page item) {
  if (item.Navigation.Show){
    var subs = MenuHelper.Sub(item).ToList();
    
    if (subs!=null && subs.Count>0) {
    <li class="@(MenuHelper.IsCurrent(item) ? " active" : "")">
      @Html.FrontHtml().PageLink(item.LinkText, item.FullName)
      <ul class="sub-menu">
        @{foreach (var subitem in subs){
        	@ShowTree(subitem);
        }}
      </ul>
    </li>
    } else {
    	<li class ="@(MenuHelper.IsCurrent(item) ? "active" : "")">@Html.FrontHtml().PageLink(item.LinkText, item.FullName)</li>
    }
  }
}