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DateTime.Compare Method

Updated: April 2009

Compares two instances of DateTime and returns an integer that indicates whether the first instance is earlier than, the same as, or later than the second instance.

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

public static int Compare(
	DateTime t1,
	DateTime t2
)

Parameters

t1
Type: System.DateTime

The first object to compare.

t2
Type: System.DateTime

The second object to compare.

Return Value

Type: System.Int32
A signed number indicating the relative values of t1 and t2.

Value Type

Condition

Less than zero

t1 is earlier than t2.

Zero

t1 is the same as t2.

Greater than zero

t1 is later than t2.

Before comparing DateTime objects, ensure that the objects represent times in the same time zone.

The following example demonstrates the Compare method.

DateTime date1 = new DateTime(2009, 8, 1, 0, 0, 0);
DateTime date2 = new DateTime(2009, 8, 1, 12, 0, 0);
int result = DateTime.Compare(date1, date2);
string relationship;

if (result < 0)
   relationship = "is earlier than";
else if (result == 0)
   relationship = "is the same time as";         
else
   relationship = "is later than";

Console.WriteLine("{0} {1} {2}", date1, relationship, date2);
// The example displays the following output: 
//    8/1/2009 12:00:00 AM is earlier than 8/1/2009 12:00:00 PM

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Date

History

Reason

April 2009

Replaced the example.

Customer feedback.

Community Additions

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