Guid.NewGuid Method (System)

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NewGuid Method

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This page is specific to

Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

Guid..::.NewGuid Method

Initializes a new instance of the Guid class.

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

Syntax

Visual Basic (Declaration)

Public Shared Function NewGuid As Guid

Visual Basic (Usage)

Dim returnValue As Guid

returnValue = Guid.NewGuid()

public static Guid NewGuid()

Visual C++

public:
static Guid NewGuid()

JScript

public static function NewGuid() : Guid

Return Value

Type: System..::.Guid
A new Guid object.

Remarks

This is a convenient static method that you can call to get a new Guid.

There is a very low probability that the value of the new Guid is all zeroes or equal to any other Guid.

Examples

The following code example creates and displays the value of two Guid objects.

Visual Basic

' This code example demonstrates the Guid.NewGuid() method.
Imports System

Class Sample
    Public Shared Sub Main() 
        Dim g As Guid
' Create and display the value of two GUIDs.
        g = Guid.NewGuid()
        Console.WriteLine(g)
        Console.WriteLine(Guid.NewGuid())
    End Sub 'Main
End Class 'Sample
'
'This code example produces the following results:
'
'0f8fad5b-d9cb-469f-a165-70867728950e
'7c9e6679-7425-40de-944b-e07fc1f90ae7
'

// This code example demonstrates the Guid.NewGuid() method.

using System;

class Sample 
{
    public static void Main() 
    {
    Guid g;
// Create and display the value of two GUIDs.
    g = Guid.NewGuid();
    Console.WriteLine(g);
    Console.WriteLine(Guid.NewGuid());
    }
}

/*
This code example produces the following results:

0f8fad5b-d9cb-469f-a165-70867728950e
7c9e6679-7425-40de-944b-e07fc1f90ae7

*/

Platforms

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.

Version Information

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Reference

Guid Structure

Guid Members

System Namespace