DateTime.AddYears
using System; class MainClass { public static void Main() { DateTime myDateTime9 = new DateTime(2004, 1, 1); Console.WriteLine("Initial myDateTime9 = " + myDateTime9); myDateTime9 = myDateTime9.AddYears(1); myDateTime9 = myDateTime9.AddMonths(5); myDateTime9 = myDateTime9.AddDays(3); myDateTime9 = myDateTime9.AddMinutes(30); myDateTime9 = myDateTime9.AddSeconds(15); Console.WriteLine("Final myDateTime9 = " + myDateTime9); } }