using System.Collections.Generic;
List<string> list = new List<string>();
list.Add(newElement);
List<List<string>> list1 = new List<List<string>>();
list1.Add(new List<string> { "item1", "512"});
list1.Add(new List<string> { "item3", "12" });
list1.Add(new List<string> { "item2", "2" });
list1.Add(new List<string> { "item4", "42" });
list1.Count