ExceptAt拡張メソッド

Program.cs

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

namespace ConsoleApplication1
{
    static class IEnumerableExtensions
    {
        public static IEnumerable<T> ExceptAt<T>(this IEnumerable<T> source, int index)
        {
            return source.Where((x, i) => i != index);
        }

    }

    class Program
    {
        static void Main(string[] args)
        {
            var source = Enumerable.Range(0, 5);
            foreach (var item in source.ExceptAt(2))
            {
                Console.WriteLine(item);
            }
        }
    }
}