using System;

using System.Diagnostics;

using System.Globalization;

​

public class Program

{

    private static void Benchmark(Action act, int iterations)

    {

        GC.Collect();

        Stopwatch sw = Stopwatch.StartNew();

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

        {

            act.Invoke();

        }

        sw.Stop();

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

    }

​

    public static void Main(string[] args)

    {

        Benchmark(() => { 

            var isDate = DateTime.TryParseExact("2015-05-05", new string[]{"yyyy-MM-dd", "yyyyMMdd"},

                                                CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal, out var date);

        } , 1000000);

​

    }

}