ArrayList, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Collections;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            ArrayList lista1 = new ArrayList { "1", "2", "3" };
            ArrayList lista2 = new ArrayList { "A", "B", "C" };
            List<ArrayList> total = new List<ArrayList>();
            
            total.Add(lista1);
            total.Add(lista2);
            
            Console.WriteLine("Total de elementos en la lista: " + total.Count);
            Console.WriteLine("Total de elementos en la posición 0: " + total[0].Count);
            Console.WriteLine("Total de elementos en la posición 1: " + total[1].Count);
        
            foreach(ArrayList item in total){
                Console.WriteLine("Elementos del ArrayList:");
                for(int i = 0; i < item.Count; i++){
                    Console.WriteLine(item[i]);
                }
            }
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 13 Mb, average nr of threads: 3