using System.Collections.Generic;
using System.Threading.Tasks;
static void Main(string[] args)
List<string> list1 = new List<string>();
List<string> list2 = new List<string>();
List<string> list3 = new List<string>();
string[] arrayList1 = list1.ToArray();
string[] arrayList2 = list2.ToArray();
string[] arrayList3 = list3.ToArray();
arrayList1, arrayList2, arrayList3
for (int i = 0; i < 4; i++)
Console.WriteLine(allList[1][i]);