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Path.GetTempFileName Method

Creates a uniquely named, zero-byte temporary file on disk and returns the full path of that file.

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

public static string GetTempFileName()

Return Value

Type: System.String
A String containing the full path of the temporary file.

ExceptionCondition
IOException

An I/O error occurs, such as no unique temporary file name is available.

- or -

This method was unable to create a temporary file.

This method creates a temporary file with a .TMP file extension.

The GetTempFileName method will raise an IOException if it is used to create more than 65535 files without deleting previous temporary files.

The GetTempFileName method will raise an IOException if no unique temporary file name is available. To resolve this error, delete all unneeded temporary files.

For a list of common I/O tasks, see Common I/O Tasks.

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

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

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