public static void TimeAction(string prefix, Action action)
{
    var sw = new Stopwatch();
    for (int iter = 0; iter < 5; iter++)
    {
        int gen0 = GC.CollectionCount(0);
        sw.Restart();
        for (int i = 0; i < 10000000; i++)
        {
            action();
        }
        sw.Stop();
        Console.WriteLine($"{prefix}Time: {sw.Elapsed.TotalSeconds}\tGC0: {GC.CollectionCount(0) - gen0}");
    }
}

static void Main(string[] args)
{
    Console.WriteLine("**** Measure x.x ****");
    TimeAction("Old: ", () => new VersionOld("1.1"));
    TimeAction("New: ", () => new VersionNew("1.1"));

    Console.WriteLine("**** Measure x.x.x ****");
    TimeAction("Old: ", () => new VersionOld("1.1.1"));
    TimeAction("New: ", () => new VersionNew("1.1.1"));

    Console.WriteLine("**** Measure x.x.x.x ****");
    TimeAction("Old: ", () => new VersionOld("1.1.1.1"));
    TimeAction("New: ", () => new VersionNew("1.1.1.1"));

    Console.WriteLine("**** Measure x.x.x.x with whitespace ****");
    TimeAction("Old: ", () => new VersionOld("   1   .   1   .   1   .   1   "));
    TimeAction("New: ", () => new VersionNew("   1   .   1   .   1   .   1   "));

    Console.ReadLine();
}