using System;

using System.Linq;

using System.Collections.Generic;

using System.Diagnostics;

public class Program

{

    private static void Benchmark(Action act, int iterations)

    {

        GC.Collect();

        act.Invoke(); // run once outside of loop to avoid initialization costs

        Stopwatch sw = Stopwatch.StartNew();

        for (int i = 0; i < iterations; i++)

        {

            act.Invoke();

        }

        sw.Stop();

        Console.WriteLine((sw.ElapsedTicks).ToString());

    }

​

    public static void Main(string[] args)

    {

        var nom = new List<int>();

        var rand = new Random();

​

        for (int i = 0; i < 1000000; i++)

        {

            nom.Add(rand.Next(1000));

        }

​

        Benchmark(() => { nom.FirstOrDefault(x => x > 100); }, 100000);

        Benchmark(() => { nom.Where(x => x > 100).FirstOrDefault(); }, 100000);

    }

}