V
var allList = new List<List<>();
allList.Add(new List<int>());
allList.Add(new List<bool>());
Size: a a a
V
var allList = new List<List<>();
allList.Add(new List<int>());
allList.Add(new List<bool>());
AH
V
VS
VS
AH
VS
V
V
var x = new List<IEnumerable>();
x.Add(new List<string>());
VS
IB
var x = new List<IEnumerable>();
x.Add(new List<string>());
V
var x = new List<ICollection>();
x.Add(new List<string>());
V
VS
VS
VS
VS
AH
AH
VS
? (List<?> l) => l[0]