using System;

using System.Diagnostics;

​

public class Program

{

    public static void Main()

    {

        var myDateTime = DateTime.UtcNow;

        var myDateTimeIsoString = myDateTime.ToString("o");

        var myDateTimeAgain = DateTime.Parse(myDateTimeIsoString, null, System.Globalization.DateTimeStyles.RoundtripKind);

        // Doesn't throw :)

        Debug.Assert(myDateTime == myDateTimeAgain);

    }

}