How to get data from a List in a List?

[xky]

dim A,B as list
dim All as List

A.Initialize
B.Initialize
All.Initialize

A.add(0)
B.add(1)

All.add(A)
All.add(B)

All.get(0).get(0) 'Error in here, how can I do it?

 

[Erel]

Dim l1 As List = All.Get(0)
Log(l1.get(0))