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DateTime::AddYears Method

Returns a new DateTime that adds the specified number of years to the value of this instance.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public:
DateTime AddYears(
	int value
)

Parameters

value
Type: System::Int32

A number of years. The value parameter can be negative or positive.

Return Value

Type: System::DateTime
An object whose value is the sum of the date and time represented by this instance and the number of years represented by value.

ExceptionCondition
ArgumentOutOfRangeException

value or the resulting DateTime is less than MinValue or greater than MaxValue.

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 AddYears method calculates the resulting year taking into account leap years. The month and time-of-day part of the resulting DateTime object remains the same as this instance.

If the current instance represents the leap day in a leap year, the return value depends on the target date:

  • If value + DateTime::Year is also a leap year, the return value represents the leap day in that year. For example, if four years is added to February 29, 2012, the date returned is February 29, 2016.

  • If value + DateTime::Year is not a leap year, the return value represents the day before the leap day in that year. For example, if one year is added to February 29, 2012, the date returned is February 28, 2013.

The following example illustrates using the AddYears method with a DateTime value that represents a leap year day. It displays the date for the fifteen years prior to and the fifteen years that follow February 29, 2000.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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