using System;

using System.Collections.Generic;

using System.Linq;

    public class Program

    {

        public static void Main(string[] args)

        {

            var e = GetEnumerable();

​

            var a = e.First();

            Console.WriteLine(a);

​

            var b = e.First();

            Console.WriteLine(b);

​

            var c = e.Skip(2).First();

            Console.WriteLine(c);   

        }

​

​

        private static IEnumerable<int> GetEnumerable()

        {

            Console.WriteLine("Starting");

            yield return 1;

            Console.WriteLine("One");

            yield return 2;

            Console.WriteLine("Two");

            yield return 3;

            Console.WriteLine("Three");

        }

    }

​