Subtraction Operator (DateTimeOffset, DateTimeOffset)
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DateTimeOffset.Subtraction Operator (DateTimeOffset, DateTimeOffset)

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

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 date and time to subtract from (the minuend).
right
Type: System.DateTimeOffset
The date and time to subtract (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;
outputBlock.Text += String.Format("({0}) - ({1}): {2} days, {3}:{4:d2}",
                  firstDate.ToString(),
                  secondDate.ToString(),
                  difference.Days,
                  difference.Hours,
                  difference.Minutes) + "\n";

difference = firstDate - thirdDate;
outputBlock.Text += String.Format("({0}) - ({1}): {2} days, {3}:{4:d2}",
                  firstDate.ToString(),
                  secondDate.ToString(),
                  difference.Days,
                  difference.Hours,
                  difference.Minutes) + "\n";
// 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 Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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