This documentation is archived and is not being maintained.

Guid.ToString Method (String)

Returns a String representation of the value of this Guid instance, according to the provided format specifier.

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

Public Function ToString ( _
	format As String _
) As String
Dim instance As Guid
Dim format As String
Dim returnValue As String

returnValue = instance.ToString(format)
public String ToString (
	String format
public function ToString (
	format : String
) : String



A single format specifier that indicates how to format the value of this Guid. The format parameter can be "N", "D", "B", or "P". If format is a null reference (Nothing in Visual Basic) or the empty string (""), "D" is used.

Return Value

A String representation of the value of this Guid.

Exception typeCondition


The value of format is not a null reference (Nothing in Visual Basic), the empty string (""), "N", "D", "B", or "P".

The format parameter can contain the following format specifiers. In the table that follows, all digits in the return value are hexadecimal. Each character 'x' represents a hexadecimal digit; each hyphen ('-'), bracket ('{', '}'), and parenthesis ('(', ')') appears as shown.


Format of Return Value


32 digits:



32 digits separated by hyphens:



32 digits separated by hyphens, enclosed in brackets:



32 digits separated by hyphens, enclosed in parentheses:


Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0