using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var l1=new List<int>{1,2,3,4,5};

        var l2=new List<int>(l1);

        l1[0]=99;

        Action<int> cw=(i)=>Console.WriteLine(i);

        l1.ForEach(cw);

        Console.WriteLine("----------");

        l2.ForEach(cw);

    }

}