Dim mylist As New List(Of List(Of String))
 
   mylist.Add(New List(Of String)({"a", "b", "c"}))
   mylist.Add(New List(Of String)({"d", "e", "f"}))
 
  Dim el As String = mylist(1)(2)
 
'Oder so ....
 
  Dim lst As String = String.Join(" "c, mylist(1).ToArray)