DateTime.AddYears(Int32) 已

在 dateTime 物件上新增 years：

DateTime baseDate = new DateTime(2000, 2, 29);
Console.WriteLine("Base Date: {0:d}\n", baseDate);

// Show dates of previous fifteen years.
for (int ctr = -1; ctr >= -15; ctr--)
   Console.WriteLine("{0,2} year(s) ago:{1:d}", 
                      Math.Abs(ctr), baseDate.AddYears(ctr));

Console.WriteLine();

// Show dates of next fifteen years.
for (int ctr = 1; ctr <= 15; ctr++)
   Console.WriteLine("{0,2} year(s) from now: {1:d}", 
                     ctr, baseDate.AddYears(ctr));