DateTimeOffset.Inequality(DateTimeOffset, DateTimeOffset) Operator

Definition

Namespace:

System

Assembly:

System.Runtime.dll

Source:

DateTimeOffset.cs

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

public:
 static bool operator !=(DateTimeOffset left, DateTimeOffset right);

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

static member op_Inequality : DateTimeOffset * DateTimeOffset -> bool

Public Shared Operator != (left As DateTimeOffset, right As DateTimeOffset) As Boolean

Parameters

left

DateTimeOffset

The first object to compare.

right

DateTimeOffset

The second object to compare.

Returns

Boolean

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

Remarks

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));
Console.WriteLine(date1 != date2);        // Displays False
Console.WriteLine(date1 != date3);        // Displays True

let date1 =
    DateTimeOffset(2007, 6, 3, 14, 45, 0, TimeSpan(-7, 0, 0))

let date2 =
    DateTimeOffset(2007, 6, 3, 15, 45, 0, TimeSpan(-6, 0, 0))

let date3 =
    DateTimeOffset(date1.DateTime, TimeSpan(-6, 0, 0))

printfn $"{date1 <> date2}" // Displays False
printfn $"{date1 <> date3}" // Displays True

Dim date1 As New DateTimeOffset(#6/3/2007 2:45PM#, _
             New TimeSpan(-7, 0, 0))
Dim date2 As New DateTimeOffset(#6/3/2007 3:45PM#, _
             New TimeSpan(-6, 0, 0))
Dim date3 As New DateTimeOffset(date1.DateTime, _
             New TimeSpan(-6, 0, 0))
Console.WriteLine(date1 <> date2)        ' Displays False
Console.WriteLine(date1 <> date3)        ' 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;

first.UtcDateTime = second.UtcDateTime

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 2:45PM#, _
             New TimeSpan(-7, 0, 0))
Dim date2 As New DateTimeOffset(#6/3/2007 3:45PM#, _
             New TimeSpan(-7, 0, 0))
Dim date3 As New DateTimeOffset(date1.DateTime, _
             New TimeSpan(-6, 0, 0))
Dim date4 As DateTimeOffset = date1
Console.WriteLine( _
    DateTimeOffset.op_Inequality(date1, date2))   ' Displays True
Console.WriteLine( _
    DateTimeOffset.op_Inequality(date1, date3))   ' Displays True
Console.WriteLine( _
    DateTimeOffset.op_Inequality(date1, date4))   ' Displays False

The equivalent method for this operator is DateTimeOffset.Compare(DateTimeOffset, DateTimeOffset)