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DateTime.Equality Operator

Determines whether two specified instances of DateTime are equal.

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

public static bool operator ==(
	DateTime d1,
	DateTime d2
)

Parameters

d1
Type: System.DateTime

The first object to compare.

d2
Type: System.DateTime

The second object to compare.

Return Value

Type: System.Boolean
true if d1 and d2 represent the same date and time; otherwise, false.

The Equality operator determines whether two DateTime values are equal by comparing their number of ticks. Before comparing DateTime objects, make sure that the objects represent times in the same time zone. You can do this by comparing the values of their Kind property.

The following example demonstrates the equality operator.

			System.DateTime april19 = new DateTime(2001, 4, 19);
			System.DateTime otherDate = new DateTime(1991, 6, 5);

			// areEqual gets false. 
			bool areEqual = april19 == otherDate;
				
			otherDate = new DateTime(2001, 4, 19);
			// areEqual gets true.
			areEqual = april19 == otherDate;

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.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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