Rendering a hierarchy using LINQ?

Question

Let say we have a class

Category
{
   ID,
   Name,
   ParentID
}

and a List

1, \'Item 1\', 0
2, \'Item 2\', 0
3, \'Item 3\'         


        

Answer 1

   @model List
   @{    

    Func, string> recuresive = null;
recuresive = (parentid, list) => string.Join("", list.Where(x => x.ParentId == parentid).Select(x => "
" + x.Name + "
" + recuresive(x.Id, list.Where(y => y.ParentId != parentid).ToList()) + "
"));
   }
  @Html.Raw("
" + recuresive(null, Model) + "
")