Check leap year in C#

Question

I want to add entry date + 1year to a column called finishing date.

If the entry date is in leap yr, i need to add 364 days, if not 365 days.

Is there a way to check this in c#, using current datetime's year & manipulate leap yr/not, then add the days.

Thanks.

Answer 1

You can use the DateTime.IsLeapYear method.

But just for handling that you do not really need to use that method. DateTime.AddYears takes leap years into account.

var leapYear = new DateTime(2000, 2, 29);
Console.WriteLine("Is 2000 a leap year? {0}", DateTime.IsLeapYear(leapYear.Year)); // 2000 is a leap year
Console.WriteLine("One year added to {0} is {1}", leapYear, leapYear.AddYears(1)); // 2000-02-29 plus 1 year is 2001-02-28