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DateTimeOffset.Equals Method (DateTimeOffset, DateTimeOffset)

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

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

public static bool Equals(
	DateTimeOffset first,
	DateTimeOffset second
)

Parameters

first
Type: System.DateTimeOffset

The first object to compare.

second
Type: System.DateTimeOffset

The second object to compare.

Return Value

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

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;

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.

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

DateTimeOffset firstTime = new DateTimeOffset(2007, 11, 15, 11, 35, 00, 
                                    DateTimeOffset.Now.Offset);
DateTimeOffset secondTime = firstTime;
Console.WriteLine("{0} = {1}: {2}", 
                  firstTime, secondTime, 
                  DateTimeOffset.Equals(firstTime, secondTime));

// The value of firstTime remains unchanged
secondTime = new DateTimeOffset(firstTime.DateTime, 
             TimeSpan.FromHours(firstTime.Offset.Hours + 1));      
Console.WriteLine("{0} = {1}: {2}", 
                  firstTime, secondTime, 
                  DateTimeOffset.Equals(firstTime, secondTime));

// value of firstTime remains unchanged
secondTime = new DateTimeOffset(firstTime.DateTime + TimeSpan.FromHours(1), 
                                TimeSpan.FromHours(firstTime.Offset.Hours + 1));
Console.WriteLine("{0} = {1}: {2}", 
                  firstTime, secondTime, 
                  DateTimeOffset.Equals(firstTime, secondTime));
 // 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       

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5 SP1, 3.0 SP1, 2.0 SP1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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