RemoveAtじゃないけどIndex指定して抜いたコレクション取得

Program.cs

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var source = new[] { "a", "b", "c" };

            foreach (var item in source
                .Select((x,i) => new { Item=x, Index=i})
                .Where(x => x.Index != 1)
                .Select(x=>x.Item))
            {
                Console.WriteLine(item);
            }
        }
    }
}