DateTimeOffset.Subtract Method (DateTimeOffset)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Subtracts a DateTimeOffset value that represents a specific date and time from the current DateTimeOffset object.

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


Public Function Subtract ( _
    value As DateTimeOffset _
) As TimeSpan
public TimeSpan Subtract(
    DateTimeOffset value


Return Value

Type: System..::.TimeSpan
An object that specifies the interval between the two DateTimeOffset objects.


This method converts both DateTimeOffset objects to Coordinated Universal Time (UTC) before calculating the time interval that separates them. This removes any effect that different offsets from UTC may have on the comparison.


For languages that support custom operators, you can also perform date and time subtraction by using the subtraction operator. For details, see the Subtraction method.

Because neither the current DateTimeOffset object nor the value parameter represent the date and time in a specific time zone, the Subtract(DateTimeOffset) method does not consider a particular time zone's adjustment rules when it subtracts dates and times.


The following example illustrates subtraction that uses the Subtract(DateTimeOffset) method.

Dim offsetDate As New DateTimeOffset(#12/3/2007 11:30:00 AM#, _
                               New TimeSpan(-8, 0, 0))
Dim duration As New TimeSpan(7, 18, 0, 0)
outputBlock.Text += offsetDate.Subtract(duration).ToString() + vbCrLf    ' Displays 11/25/2007 5:30:00 PM -08:00
DateTimeOffset offsetDate = new DateTimeOffset(2007, 12, 3, 11, 30, 0,
                               new TimeSpan(-8, 0, 0));
TimeSpan duration = new TimeSpan(7, 18, 0, 0);
outputBlock.Text += offsetDate.Subtract(duration).ToString() + "\n";  // Displays 11/25/2007 5:30:00 PM -08:00

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0


Windows Phone

See Also


DateTimeOffset Structure

Subtract Overload

System Namespace