This documentation is archived and is not being maintained.

Enum.ToString Method (String, IFormatProvider)

Updated: April 2009

NOTE: This API is now obsolete.

This method overload is obsolete; use Enum.ToString(String).

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

[ObsoleteAttribute("The provider argument is not used. Please use ToString(String).")]
public string ToString(
	string format,
	IFormatProvider provider


Type: System.String

A format specification.

Type: System.IFormatProvider


Return Value

Type: System.String
The string representation of the value of this instance as specified by format.


IFormattable.ToString(String, IFormatProvider)


format does not contain a valid format specification.


format equals "X", but the enumeration type is unknown.

The provider parameter is obsolete, specify only a format.

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: 1.1, 1.0
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 3.5 SP1
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 3.0 SP1
Obsolete (compiler warning) in 3.0 SP2
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 2.0 SP1
Obsolete (compiler warning) in 2.0 SP2

.NET Compact Framework

Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 2.0

XNA Framework

Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 1.0




April 2009

Added exception information.

Information enhancement.

July 2008

Revised replacement method.

Content bug fix.