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DateTimeOffset::ToFileTime Method

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

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

public:
long long ToFileTime()

Return Value

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

ExceptionCondition
ArgumentOutOfRangeException

The resulting file time would represent a date and time before midnight on January 1, 1601 C.E. Coordinated Universal Time (UTC).

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.

The ToFileTime method converts the current DateTimeOffset object's date and time to UTC before it performs the conversion. In other words, calling the ToFileTime method is equivalent to the following method call:

[C#]

this.ToUtcDateTime().ToFileTime();

[Visual Basic]

Me.ToUtcDateTime().ToFileTime()

.NET Framework

Supported in: 4, 3.5 SP1, 3.0 SP1, 2.0 SP1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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