Inequality Operator

DateTimeOffset.Inequality Operator

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

Determines whether two specified DateTimeOffset objects refer to different points in time.

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

public static bool operator !=(
	DateTimeOffset left,
	DateTimeOffset right


Type: System.DateTimeOffset
The first object to compare.
Type: System.DateTimeOffset
The second object to compare.

Return Value

Type: System.Boolean
true if left and right do not have the same UtcDateTime value; otherwise, false.

The Inequality method defines the operation of the inequality operator for DateTimeOffset objects. It always returns the opposite result from Equality. The Inequality method enables code such as the following:

DateTimeOffset date1 = new DateTimeOffset(2007, 6, 3, 14, 45, 0,
             new TimeSpan(-7, 0, 0));
DateTimeOffset date2 = new DateTimeOffset(2007, 6, 3, 15, 45, 0,
             new TimeSpan(-6, 0, 0));
DateTimeOffset date3 = new DateTimeOffset(date1.DateTime,
             new TimeSpan(-6, 0, 0));
outputBlock.Text += (date1 != date2) + "\n";        // Displays False
outputBlock.Text += (date1 != date3) + "\n";        // Displays True 

Before evaluating the left and right operands for equality, the operator converts both values to Coordinated Universal Time (UTC). The operation is equivalent to the following:

return first.UtcDateTime == second.UtcDateTime;

In other words, the Inequality method determines whether the two DateTimeOffset objects represent different points in time. It directly compares neither dates and times nor offsets.

Languages that do not support custom operators can call the Compare method instead. In addition, some languages can also call the Inequality method directly, as the following example shows.

Dim date1 As New DateTimeOffset(#6/3/2007 2:45:00 PM#, _
             New TimeSpan(-7, 0, 0))
Dim date2 As New DateTimeOffset(#6/3/2007 3:45:00 PM#, _
             New TimeSpan(-7, 0, 0))
Dim date3 As New DateTimeOffset(date1.DateTime, _
             New TimeSpan(-6, 0, 0))
Dim date4 As DateTimeOffset = date1
outputBlock.Text += _
    DateTimeOffset.op_Inequality(date1, date2).ToString()   ' Displays True & vbCrLf
outputBlock.Text += _
    DateTimeOffset.op_Inequality(date1, date3).ToString()   ' Displays True & vbCrLf
outputBlock.Text += _
    DateTimeOffset.op_Inequality(date1, date4).ToString()   ' Displays False & vbCrLf

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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