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DateTimeOffset.Subtraction Operator (DateTimeOffset, DateTimeOffset)

Subtracts one DateTimeOffset object from another and yields a time interval.

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

public static TimeSpan operator -(
	DateTimeOffset left,
	DateTimeOffset right
)

Parameters

left
Type: System.DateTimeOffset

The minuend.

right
Type: System.DateTimeOffset

The subtrahend.

Return Value

Type: System.TimeSpan
An object that represents the difference between left and right.

The Subtraction method defines the subtraction operation for DateTimeOffset objects. It enables code such as the following:

DateTimeOffset firstDate = new DateTimeOffset(2008, 3, 25, 18, 0, 0, 
                                              new TimeSpan(-7, 0, 0));
DateTimeOffset secondDate = new DateTimeOffset(2008, 3, 25, 18, 0, 0, 
                                               new TimeSpan(-5, 0, 0));
DateTimeOffset thirdDate = new DateTimeOffset(2008, 2, 28, 9, 0, 0, 
                                              new TimeSpan(-7, 0, 0));
TimeSpan difference;

difference = firstDate - secondDate;
Console.WriteLine("({0}) - ({1}): {2} days, {3}:{4:d2}", 
                  firstDate.ToString(), 
                  secondDate.ToString(), 
                  difference.Days, 
                  difference.Hours, 
                  difference.Minutes);      

difference = firstDate - thirdDate;
Console.WriteLine("({0}) - ({1}): {2} days, {3}:{4:d2}", 
                  firstDate.ToString(), 
                  secondDate.ToString(), 
                  difference.Days, 
                  difference.Hours, 
                  difference.Minutes); 
// The example produces the following output: 
//    (3/25/2008 6:00:00 PM -07:00) - (3/25/2008 6:00:00 PM -05:00): 0 days, 2:00 
//    (3/25/2008 6:00:00 PM -07:00) - (3/25/2008 6:00:00 PM -05:00): 26 days, 9:00                                 

Languages that do not support custom operators and operator overloading can call the DateTimeOffset.Subtract(DateTimeOffset) method instead.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5 SP1, 3.0 SP1, 2.0 SP1

.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

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: 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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