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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
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 temporary file is created within the user’s temporary folder, which is the path returned by the GetTempPath method.

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.

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

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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