DateTime::AddMonths Method (Int32)
Returns a new DateTime that adds the specified number of months to the value of this instance.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- months
-
Type:
System::Int32
A number of months. The months parameter can be negative or positive.
Return Value
Type: System::DateTimeAn object whose value is the sum of the date and time represented by this instance and months.
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException |
This method does not change the value of this DateTime object. Instead, it returns a new DateTime object whose value is the result of this operation.
The AddMonths method calculates the resulting month and year, taking into account leap years and the number of days in a month, then adjusts the day part of the resulting DateTime object. If the resulting day is not a valid day in the resulting month, the last valid day of the resulting month is used. For example, March 31st + 1 month = April 30th, and March 31st - 1 month = February 28 for a non-leap year and February 29 for a leap year.
The time-of-day part of the resulting DateTime object remains the same as this instance.
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1