This documentation is archived and is not being maintained.

Guid.NewGuid Method

Initializes a new instance of the Guid class.

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

public static Guid NewGuid()

Return Value

Type: System.Guid
A new Guid object.

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.

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

// 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

*/

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: 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
Show: