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

namespace IEnumなんとかてすと
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] A = new int[16] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

            foreach (var o in A.SkipEnd())
            {
                Console.Write("{0} ", o);
            }

            return;
 
        }
    }

    public static class ExtFunc
    {
        public static IEnumerable<T> SkipEnd<T>(this IEnumerable<T> Enumerable)
        {
            var En = Enumerable.GetEnumerator();
            int N = Enumerable.Count();
            int i = 0;
            while (En.MoveNext())
            {
                i++;
                if (N == i) break;
                yield return En.Current;
            }
        }
    }
}