DateTime.ToFileTimeUtc Method (System)

ToFileTimeUtc Method

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Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

DateTime..::.ToFileTimeUtc Method

Converts the value of the current DateTime object to a Windows file time.

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

Syntax

Visual Basic (Declaration)

Public Function ToFileTimeUtc As Long

Visual Basic (Usage)

Dim instance As DateTime
Dim returnValue As Long

returnValue = instance.ToFileTimeUtc()

public long ToFileTimeUtc()

Visual C++

public:
long long ToFileTimeUtc()

JScript

public function ToFileTimeUtc() : long

Return Value

Type: System..::.Int64
The value of the current DateTime object expressed as a Windows file time.

Exceptions

Exception	Condition
ArgumentOutOfRangeException	The resulting file time would represent a date and time before 12:00 midnight January 1, 1601 C.E. UTC.

Remarks

A Windows file time is a 64-bit value that represents the number of 100-nanosecond intervals that have elapsed since 12:00 midnight, January 1, 1601 A.D. (C.E.) Coordinated Universal Time (UTC). Windows uses a file time to record when an application creates, accesses, or writes to a file.

Prior versions of the ToFileTimeUtc method assume the current DateTime object is a UTC time. Starting with the.NET Framework version 2.0, the ToFileTimeUtc method uses the Kind property to determine whether the current DateTime object is a local time, a UTC time, or an unspecified kind of time which is treated as a UTC time.

Platforms

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.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Reference