using System; class Test { public static void Main() { // Create a TimeSpan representing 6.5 days. TimeSpan timespan1 = new TimeSpan(6, 12, 0, 0); // Create a TimeSpan representing 0.5 days. TimeSpan timespan2 = new TimeSpan(0, 12, 0, 0); TimeSpan oneWeek = timespan1 + timespan2; DateTime now = DateTime.Now; DateTime past = now - oneWeek; // Create a DateTime representing 1 week in the future. DateTime future = now + oneWeek; // Display the DateTime instances. Console.WriteLine("Now : {0}", now); Console.WriteLine("Past : {0}", past); Console.WriteLine("Future: {0}", future); } }