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DateTimeOffset.Equals Method (DateTimeOffset, DateTimeOffset)

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

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

Syntax

'Declaration
Public Shared Function Equals ( _
    first As DateTimeOffset, _
    second As DateTimeOffset _
) As Boolean
public static bool Equals(
    DateTimeOffset first,
    DateTimeOffset second
)

Parameters

Return Value

Type: System.Boolean
true if the two DateTimeOffset objects have the same UtcDateTime value; otherwise, false.

Remarks

Before it performs the comparison, this method converts both DateTimeOffset objects to Coordinated Universal Time (UTC). The method is equivalent to the following:

Return first.UtcDateTime = second.UtcDateTime
return first.UtcDateTime == second.UtcDateTime;

In other words, the Equals(DateTimeOffset, DateTimeOffset) 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.

Examples

The following example illustrates calls to the Equals(DateTimeOffset, DateTimeOffset) method to test various pairs of DateTimeOffset objects for equality.

Dim firstTime As New DateTimeOffset(#11/15/2007 11:35:00 AM#, _
                                    DateTimeOffset.Now.Offset)
Dim secondTime As DateTimeOffset = firstTime
outputBlock.Text += String.Format("{0} = {1}: {2}", _
                  firstTime, secondTime, _
                  DateTimeOffset.Equals(firstTime, secondTime)) + vbCrLf

' The value of firstTime remains unchanged
secondTime = New DateTimeOffset(firstTime.DateTime, _
             TimeSpan.FromHours(firstTime.Offset.Hours + 1))
outputBlock.Text += String.Format("{0} = {1}: {2}", _
                  firstTime, secondTime, _
                  DateTimeOffset.Equals(firstTime, secondTime)) + vbCrLf

' value of firstTime remains unchanged
secondTime = New DateTimeOffset(firstTime.DateTime + TimeSpan.FromHours(1), _
                                TimeSpan.FromHours(firstTime.Offset.Hours + 1))
outputBlock.Text += String.Format("{0} = {1}: {2}", _
                  firstTime, secondTime, _
                  DateTimeOffset.Equals(firstTime, secondTime)) + vbCrLf
' The example produces the following output:
'       11/15/2007 11:35:00 AM -07:00 = 11/15/2007 11:35:00 AM -07:00: True
'       11/15/2007 11:35:00 AM -07:00 = 11/15/2007 11:35:00 AM -06:00: False
'       11/15/2007 11:35:00 AM -07:00 = 11/15/2007 12:35:00 PM -06:00: True       
DateTimeOffset firstTime = new DateTimeOffset(2007, 11, 15, 11, 35, 00,
                                    DateTimeOffset.Now.Offset);
DateTimeOffset secondTime = firstTime;
outputBlock.Text += String.Format("{0} = {1}: {2}",
                  firstTime, secondTime,
                  DateTimeOffset.Equals(firstTime, secondTime)) + "\n";

// The value of firstTime remains unchanged
secondTime = new DateTimeOffset(firstTime.DateTime,
             TimeSpan.FromHours(firstTime.Offset.Hours + 1));
outputBlock.Text += String.Format("{0} = {1}: {2}",
                  firstTime, secondTime,
                  DateTimeOffset.Equals(firstTime, secondTime)) + "\n";

// value of firstTime remains unchanged
secondTime = new DateTimeOffset(firstTime.DateTime + TimeSpan.FromHours(1),
                                TimeSpan.FromHours(firstTime.Offset.Hours + 1));
outputBlock.Text += String.Format("{0} = {1}: {2}",
                  firstTime, secondTime,
                  DateTimeOffset.Equals(firstTime, secondTime)) + "\n";
// The example produces the following output:
//       11/15/2007 11:35:00 AM -07:00 = 11/15/2007 11:35:00 AM -07:00: True
//       11/15/2007 11:35:00 AM -07:00 = 11/15/2007 11:35:00 AM -06:00: False
//       11/15/2007 11:35:00 AM -07:00 = 11/15/2007 12:35:00 PM -06:00: True       

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.