using System;

class Program
{
    static void Main()
    {
        Action<object> p = Console.WriteLine;

        // We'll start by getting the current time.
        DateTime now = DateTime.Now;
        p(now);

        // You can create a DateTime struct by providing the
        // year, month, day, etc. Times are always associated
        // with a Kind, which is similar to a time zone.
        DateTime then = new DateTime(2009, 11, 17, 20, 34, 58, 651, DateTimeKind.Utc);
        p(then);

        // You can extract the various components of the DateTime
        // value as expected.
        p(then.Year);
        p(then.Month);
        p(then.Day);
        p(then.Hour);
        p(then.Minute);
        p(then.Second);
        p(then.Millisecond);
        p(then.Kind);

        // The day of the week is also available.
        p(then.DayOfWeek);

        // These methods compare two times, testing if the
        // first occurs before, after, or at the same time
        // as the second, respectively.
        p(then < now);
        p(then > now);
        p(then == now);

        // The Subtract method returns a TimeSpan representing
        // the interval between two times.
        TimeSpan diff = now.Subtract(then);
        p(diff);

        // We can compute the length of the duration in
        // various units.
        p(diff.TotalHours);
        p(diff.TotalMinutes);
        p(diff.TotalSeconds);
        p(diff.TotalMilliseconds);

        // You can use Add to advance a time by a given
        // TimeSpan, or with a negative TimeSpan to move backwards.
        p(then.Add(diff));
        p(then.Add(-diff));
    }
}