DateTimeOffset.Equality(DateTimeOffset, DateTimeOffset) Operator

Definition

Namespace:

System

Assembly:

System.Runtime.dll

Source:

DateTimeOffset.cs

Determines whether two specified DateTimeOffset objects represent the same point in time.

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

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

static member ( = ) : 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 both DateTimeOffset objects have the same UtcDateTime value; otherwise, false.

Remarks

The Equality method defines the operation of the equality operator for DateTimeOffset objects. It 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 True
Console.WriteLine(date1 == date3);        // Displays False

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 True
printfn $"{date1 = date3}" // Displays False

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 True
Console.WriteLine(date1 = date3)        ' Displays False

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 Equality method determines whether the two DateTimeOffset objects represent a single point in time. It directly compares neither dates and times nor offsets. To determine whether two DateTimeOffset objects represent the same time and have the same offset value, use the EqualsExact method.

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

See also

• Equals