This documentation is archived and is not being maintained.

Enum.ToString Method (String, IFormatProvider)

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This method overload is obsolete; use Enum.ToString(String).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

Specify only format; the provider parameter is obsolete.

.NET Framework

Supported in: 1.1, 1.0
Obsolete (compiler warning) in 4
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 Framework Client Profile

Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.