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DateTimeOffset.Add Method

Adds a specified time interval to a DateTimeOffset object.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
'Declaration
Public Function Add ( _
	timeSpan As TimeSpan _
) As DateTimeOffset
'Usage
Dim instance As DateTimeOffset 
Dim timeSpan As TimeSpan 
Dim returnValue As DateTimeOffset 

returnValue = instance.Add(timeSpan)

Parameters

timeSpan
Type: System.TimeSpan

A TimeSpan object that represents a positive or a negative time interval.

Return Value

Type: System.DateTimeOffset
A DateTimeOffset object whose value is the sum of the date and time represented by the current DateTimeOffset object and the time interval represented by timeSpan.
ExceptionCondition
ArgumentOutOfRangeException

The resulting DateTimeOffset value is less than MinValue.

-or-

The resulting DateTimeOffset value is greater than MaxValue.

You can use the Add method to add more than one kind of time interval (days, hours, minutes, seconds, or milliseconds) in a single operation. This method's behavior is identical to the addition operator. The DateTimeOffset structure also supports specialized addition methods (such as AddDays, AddHours, and AddMinutes) for each time interval.

NoteNote:

This method returns a new DateTimeOffset object. It does not modify the value of the current object by adding timeSpan to its date and time.

The Add method does not affect the value of the current DateTimeOffset object's Offset property.

Because a DateTimeOffset object does not represent the date and time in a specific time zone, the Add method does not consider a particular time zone's adjustment rules when it performs date and time arithmetic.

If the timeSpan parameter is Nothing, this method returns the value of the original DateTimeOffset object unchanged.

The following example creates an array of TimeSpan objects that represent the flight times between destinations. The Add method then adds these times to a DateTimeOffset object that represents a flight's initial takeoff time. The result reflects the scheduled arrival time at each destination.

Dim takeOff As New DateTimeOffset(#6/1/2007 7:55AM#, _
                                  New TimeSpan(-5, 0, 0))
Dim currentTime As DateTimeOffset = takeOff
Dim flightTimes() As TimeSpan = New TimeSpan() _
                  {New TimeSpan(2, 25, 0), New TimeSpan(1, 48, 0)}
Console.WriteLine("Takeoff is scheduled for {0:d} at {0:T}.", _
                  takeOff)
For ctr As Integer = flightTimes.GetLowerBound(0) To _
                     flightTimes.GetUpperBound(0)
   currentTime = currentTime.Add(flightTimes(ctr))
   Console.WriteLine("Destination #{0} at {1}.", ctr + 1, currentTime)
Next

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5 SP1, 3.0 SP1, 2.0 SP1
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