DateTime.Add(TimeSpan)
using System; class MainClass { public static void Main() { DateTime myDateTime = DateTime.Parse("1/11/2004 23:10:30"); TimeSpan myTimeSpan = new TimeSpan(1, 2, 4, 10); DateTime myDateTime7 = myDateTime.Add(myTimeSpan); Console.WriteLine("myTimeSpan = " + myTimeSpan); Console.WriteLine("myDateTime6.Add(myTimeSpan) = " + myDateTime7); } }