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DateTimeOffset.Subtraction Operator

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

A DateTimeOffset object (the minuend).

right
Type: System.DateTimeOffset

A second DateTimeOffset object (the subtrahend).

Return Value

Type: System.TimeSpan
A TimeSpan 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.

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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