ToLocalTime在时区之间工作吗?

DateTime now = DateTime.Now;
for (DateTime dt = now; dt < now.AddYears(1); dt += TimeSpan.FromMinutes(30))
{
    DateTime dt2 = dt.ToUniversalTime().ToLocalTime(); // dt2 == dt ?
    if (dt2 != dt)
    {
        Console.WriteLine("Not equal: {0}, {1}", dt, dt2);
    }
}

我的计算机上的结果(您可能会得到不同的结果):

Not equal: 27-03-2011 02:26:28, 27-03-2011 03:26:28
Not equal: 27-03-2011 02:56:28, 27-03-2011 03:56:28