using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var roe = new Foo(new List<int> { 1, 2 });

        roe.PrintTheFirstElement();

    }

    internal class Foo

    {

        private readonly List<int>.Enumerator _enumerator;

        public Foo(List<int> list)

        {

            _enumerator = list.GetEnumerator();

        }

        public void PrintTheFirstElement()

        {

            var next = _enumerator.MoveNext();

            Console.WriteLine(_enumerator.Current);

        }

    }

}