UUIDNext 1.1.0

There is a newer version of this package available.
See the version list below for details.
dotnet add package UUIDNext --version 1.1.0                
NuGet\Install-Package UUIDNext -Version 1.1.0                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="UUIDNext" Version="1.1.0" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add UUIDNext --version 1.1.0                
#r "nuget: UUIDNext, 1.1.0"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install UUIDNext as a Cake Addin
#addin nuget:?package=UUIDNext&version=1.1.0

// Install UUIDNext as a Cake Tool
#tool nuget:?package=UUIDNext&version=1.1.0                


A fast and modern .NET library to generate UUID/GUID that are either sequential and database friendly (versions 7), name based (versions 5) or random (version 4).

How to Install

UUIDNext is available on nuget.org

How to Use

using System;
using UUIDNext;

// Creating a database friendly UUID (version 7)
Guid sequentialUuid = Uuid.NewDatabaseFriendly();
Console.WriteLine($"This is a database friendly UUID : {sequentialUuid}");

// Creating a name based UUID (Version 5)
Guid urlNamespaceId = Guid.Parse("6ba7b811-9dad-11d1-80b4-00c04fd430c8");
Guid nameBasedUuid = Uuid.NewNameBased(urlNamespaceId, "https://github.com/uuid6/uuid6-ietf-draft");
Console.WriteLine($"This is a name based UUID : {nameBasedUuid}");

What are all these versions ? I didn't know there were so many types of GUID

The traditional GUID (a.k.a UUID Version 4) is fine and works really well for it's intended use. But its random nature is problematic in some scenarios that's why other UUID versions have been created.

UUID Version 3 and 5 are name-based UUIDs. They take a namespace and a name as input and produce a hash-like UUID. Usage of Version 3 is discouraged as it is based on the obsolete MD5 hash function.

UUID Version 6 and 7 are intended to be used as a primary key in a database. The randomness of UUID V4 has a negative impact on performance when used as a key in a database and UUID V1 exposed the MAC address of the machine where it was created. UUID V6 & 7 aims to take the best of both worlds without their drawbacks. They are currently at the draft stage so their structure and implementation may change.

Why creating a new Library ? is there a problem with Guid.NewGuid() ?

As I said, UUIDs V4 produced by Guid.NewGuid() are fine when they are not used in the scenarios described above and there's no reason to stop using them. But if you find yourself in a position where UUID V4 is suboptimal, this library is for you.


RFC 4122 : The standard for UUID Version 1 to 5.

Draft UUID V6 RFC : The proposed standard for UUID Version 6 to 8

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.
  • .NETStandard 2.1

    • No dependencies.

NuGet packages (7)

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Package Description


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GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
3.0.0 4,662 7/2/2024
3.0.0-beta3 4,761 5/16/2024
3.0.0-beta2 10,553 1/24/2024
3.0.0-beta 1,706 11/21/2023
2.0.2 386,907 6/8/2023
2.0.0 86,108 1/9/2023
1.1.1 41,663 4/25/2022
1.1.0 609 4/3/2022
1.0.2 3,112 12/22/2021
1.0.1 1,392 8/27/2021
1.0.0 446 8/23/2021