Calculates a date that is a specified number of months away from a specified initial date.
Assembly: mscorlib (in mscorlib.dll)
abstract AddMonths : time:DateTime * months:int -> DateTime override AddMonths : time:DateTime * months:int -> DateTime
- Type: System.DateTime
The date to which to add months. The UmAlQuraCalendar class supports only dates from 04/30/1900 00.00.00 (Gregorian date) through 11/16/2077 23:59:59 (Gregorian date).
- Type: System.Int32
The positive or negative number of months to add.
Return ValueType: System.DateTime
The date yielded by adding the number of months specified by the months parameter to the date specified by the time parameter.
The day part of the resulting DateTime is affected if the resulting day is not a valid day in the resulting month of the resulting year. It is changed to the last valid day in the resulting month of the resulting year. The year part of the resulting DateTime is affected if the resulting month is outside the year of the specified DateTime. This implementation supports only the current era. Therefore, an exception is thrown if the resulting year is outside the era of the specified DateTime. The time-of-day part of the resulting DateTime remains the same as the specified DateTime.
For example, if the specified month is Zulkadah, which has 30 days, the specified day is the 30th day of that month, and the value of the months parameter is 3, the resulting year is one more than the specified year, the resulting month is Safar, and the resulting day is the 29th day, which is the last day in Safar.
The Kind property of the returned DateTime value always equals DateTimeKind.Unspecified. You can preserve the Kind property of the time parameter by calling the DateTime.SpecifyKind method, as the following example shows.
The following example instantiates a DateTime value and displays the values of several of its components in the Um Al Qura calendar. Next, it calls the AddYears and methods to add 2 years and 10 months in the Um Al Qura calendar to the date value. Finally, it again displays the values of these date components in the Um Al Qura calendar.