FluentValidation 7.6.0-preview1

Prefix Reserved
.NET Standard 1.1 This package targets .NET Standard 1.1. The package is compatible with this framework or higher. .NET Framework 4.5 This package targets .NET Framework 4.5. The package is compatible with this framework or higher.
This is a prerelease version of FluentValidation.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package FluentValidation --version 7.6.0-preview1
                    


                    

                
NuGet\Install-Package FluentValidation -Version 7.6.0-preview1
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="FluentValidation" Version="7.6.0-preview1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="FluentValidation" Version="7.6.0-preview1" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="FluentValidation" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add FluentValidation --version 7.6.0-preview1
                    


                    

                
#r "nuget: FluentValidation, 7.6.0-preview1"
#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. 
#:package FluentValidation@7.6.0-preview1
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=FluentValidation&version=7.6.0-preview1&prerelease
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=FluentValidation&version=7.6.0-preview1&prerelease
                    


                            Install as a Cake Tool

A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.

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.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp1.0 was computed.  netcoreapp1.1 was computed.  netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard1.1 is compatible.  netstandard1.2 was computed.  netstandard1.3 was computed.  netstandard1.4 was computed.  netstandard1.5 was computed.  netstandard1.6 is compatible.  netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net45 is compatible.  net451 was computed.  net452 was computed.  net46 was computed.  net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen30 was computed.  tizen40 was computed.  tizen60 was computed. 
Universal Windows Platform uap was computed.  uap10.0 was computed. 
Windows Phone wpa81 was computed. 
Windows Store netcore was computed.  netcore45 was computed.  netcore451 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.

NuGet packages (2.7K)

Showing the top 5 NuGet packages that depend on FluentValidation:

Package Downloads
FluentValidation.DependencyInjectionExtensions

Dependency injection extensions for FluentValidation
FluentValidation.AspNetCore

AspNetCore integration for FluentValidation
MicroElements.Swashbuckle.FluentValidation

Swagger ISchemaFilter that uses FluentValidation validators instead System.ComponentModel based attributes.
Ocelot

Ocelot is an API gateway based on .NET stack.
Reo.Core.Validation

Package Description

GitHub repositories (245)

Showing the top 20 popular GitHub repositories that depend on FluentValidation:

Repository Stars
ardalis/CleanArchitecture
Clean Architecture Solution Template: A proven Clean Architecture Template for ASP.NET Core 9
abpframework/abp
Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.
kgrzybek/modular-monolith-with-ddd
Full Modular Monolith application with Domain-Driven Design approach.
Sonarr/Sonarr
Smart PVR for newsgroup and bittorrent users.
Radarr/Radarr
Movie organizer/manager for usenet and torrent users.
aspnetboilerplate/aspnetboilerplate
ASP.NET Boilerplate - Web Application Framework
dotnet-architecture/eShopOnWeb
Sample ASP.NET Core 8.0 reference application, now community supported: https://github.com/NimblePros/eShopOnWeb
MudBlazor/MudBlazor
Blazor Component Library based on Material Design principles with an emphasis on ease of use and extensibility
ThreeMammals/Ocelot
.NET API Gateway
NancyFx/Nancy
Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono
EduardoPires/EquinoxProject
Web Application ASP.NET 9 using Clean Architecture, DDD, CQRS, Event Sourcing and a lot of good practices
canton7/SyncTrayzor
Windows tray utility / filesystem watcher / launcher for Syncthing
FastEndpoints/FastEndpoints
A light-weight REST API development framework for ASP.NET 8 and newer.
Prowlarr/Prowlarr
Prowlarr is an indexer manager/proxy built on the popular *arr .net/reactjs base stack to integrate with your various PVR apps, supporting management of both Torrent Trackers and Usenet Indexers.
jasontaylordev/NorthwindTraders
Northwind Traders is a sample application built using ASP.NET Core and Entity Framework Core.
Lidarr/Lidarr
Looks and smells like Sonarr but made for music.
microsoft/RulesEngine
A fast and reliable .NET Rules Engine with extensive Dynamic expression support
fullstackhero/blazor-starter-kit
Clean Architecture Template for Blazor WebAssembly Built with MudBlazor Components.
Megabit/Blazorise
Blazorise is a component library built on top of Blazor with support for CSS frameworks like Bootstrap, Tailwind, Bulma, AntDesign, and Material.
Readarr/Readarr
Book Manager and Automation (Sonarr for Ebooks)
Version Downloads Last Updated
12.0.0 6,342,311 5/5/2025
12.0.0-preview1 190,637 1/2/2025
11.11.0 32,770,405 11/16/2024
11.10.0 17,321,636 9/15/2024
11.9.2 23,962,858 6/10/2024
11.9.1 12,372,425 4/23/2024
11.9.0 30,755,864 12/21/2023
11.8.1 8,760,634 11/22/2023
11.8.0 9,135,814 10/19/2023
11.7.1 11,271,290 8/12/2023
11.7.0 131,159 8/11/2023
11.6.0 8,589,831 7/4/2023
11.5.2 18,972,282 4/7/2023
11.5.1 60,379,639 2/20/2023
11.5.0 2,926,306 2/13/2023
11.4.0 19,132,277 11/23/2022
11.3.0 3,577,381 11/10/2022
11.2.2 16,385,467 9/11/2022
11.2.1 22,929,573 8/28/2022
11.2.0 7,646,737 8/8/2022
11.1.1 658,780 8/6/2022
11.1.0 13,121,200 6/22/2022
11.0.3 3,527,562 6/10/2022
11.0.2 5,351,995 5/27/2022
11.0.1 6,699,351 5/7/2022
11.0.0 6,315,786 4/30/2022
10.4.0 20,504,918 3/11/2022
10.3.6 27,026,854 12/13/2021
10.3.5 3,210,785 11/30/2021
10.3.4 10,199,853 10/22/2021
10.3.3 11,962,668 8/24/2021
10.3.1 730,222 8/19/2021
10.3.0 8,432,812 7/9/2021
10.2.3 8,456,271 6/3/2021
10.2.2 463,837 6/1/2021
10.2.1 1,363,091 5/30/2021
10.2.0 384,889 5/28/2021
10.1.0 5,446,205 4/28/2021
10.0.4 4,216,182 4/17/2021
9.5.4 6,845,378 4/5/2021
9.5.3 4,053,926 3/15/2021
9.5.2 2,002,562 3/8/2021
9.5.1 6,756,818 2/11/2021
9.5.0 3,385,406 1/31/2021
9.4.0 3,096,508 1/14/2021
9.3.0 14,895,229 11/10/2020
9.3.0-preview3 39,658 10/19/2020
9.3.0-preview2 152,296 9/15/2020
9.3.0-preview1 13,482 8/26/2020
9.2.2 7,155,609 9/20/2020
9.2.1 31,787 9/19/2020
9.2.0 7,910,724 8/26/2020
9.1.3 1,029,771 8/19/2020
9.1.2 963,552 8/12/2020
9.1.1 671,748 8/8/2020
9.1.0 285,048 8/8/2020
9.0.1 5,468,405 7/14/2020
9.0.0-preview5 89,881 5/23/2020
9.0.0-preview4 141,681 4/22/2020
9.0.0-preview3 203,397 2/29/2020
9.0.0-preview2 32,445 2/21/2020
9.0.0-preview1 100,051 2/8/2020
8.6.3 7,555,891 8/28/2020
8.6.2 28,721,702 2/29/2020
8.6.1 12,988,045 12/28/2019
8.6.0 4,310,680 12/4/2019
8.5.1 3,863,578 11/2/2019
8.5.0 6,483,763 9/24/2019
8.5.0-preview5 69,972 9/1/2019
8.5.0-preview4 101,325 7/23/2019
8.5.0-preview3 32,046 7/10/2019
8.5.0-preview2 87,220 6/13/2019
8.5.0-preview1 62,801 5/10/2019
8.4.0 14,579,153 5/10/2019
8.3.0 4,091,199 4/24/2019
8.2.3 717,010 4/12/2019
8.2.2 1,102,718 4/5/2019
8.2.1 496,467 4/4/2019
8.2.0 1,084,451 3/26/2019
8.1.3 5,167,422 1/25/2019
8.1.2 2,373,207 12/18/2018
8.1.1 606,846 12/11/2018
8.1.0 796,381 12/6/2018
8.1.0-preview2 29,729 11/14/2018
8.1.0-preview1 28,034 10/14/2018
8.0.101 942,073 11/24/2018
8.0.100 4,078,343 9/4/2018
8.0.0 1,131,240 8/16/2018
8.0.0-rc1 54,054 7/24/2018
8.0.0-preview4 25,932 7/16/2018
8.0.0-preview3 24,510 7/13/2018
8.0.0-preview2 24,313 7/13/2018
7.6.105 1,797,178 8/11/2018
7.6.104 2,788,961 7/6/2018
7.6.103 1,309,672 6/16/2018
7.6.102 339,277 6/14/2018
7.6.101 77,489 6/13/2018
7.6.100 179,034 6/7/2018
7.6.0 405,065 6/1/2018
7.6.0-preview1 51,791 4/12/2018
7.5.2 3,937,980 3/16/2018
7.5.1 276,118 3/11/2018
7.5.0 752,025 2/26/2018
7.4.0 2,278,285 1/26/2018
7.3.4 1,117,850 1/2/2018
7.3.3 195,718 12/22/2017
7.3.2 75,636 12/21/2017
7.3.1 344,257 12/13/2017
7.3.0 122,288 12/13/2017
7.3.0-beta3 28,400 12/8/2017
7.3.0-beta2 47,113 11/20/2017
7.3.0-beta1 25,264 11/11/2017
7.2.1 2,905,770 10/24/2017
7.2.0 835,727 10/5/2017
7.2.0-beta3 41,673 9/5/2017
7.2.0-beta2 27,478 8/22/2017
7.2.0-beta1 23,705 8/19/2017
7.1.1 2,282,876 7/25/2017
7.1.0 559,248 6/28/2017
7.1.0-beta1 23,461 6/24/2017
7.0.3 759,275 6/7/2017
7.0.2 288,170 5/26/2017
7.0.1 93,566 5/23/2017
7.0.0 735,321 5/19/2017
7.0.0-beta3 35,959 5/1/2017
7.0.0-beta2 27,151 4/17/2017
7.0.0-beta1 24,727 4/7/2017
6.4.1 2,068,434 3/15/2017
6.4.1-beta1 23,831 3/13/2017
6.4.0 1,034,591 3/3/2017
6.4.0-rc4 146,479 2/13/2017
6.4.0-rc3 39,515 2/3/2017
6.4.0-rc2 39,819 1/30/2017
6.4.0-rc1 23,602 1/30/2017
6.4.0-beta9 91,227 11/21/2016
6.4.0-beta8 50,620 10/31/2016
6.4.0-beta7 24,240 10/28/2016
6.4.0-beta6 24,553 10/25/2016
6.4.0-beta5 24,135 10/24/2016
6.4.0-beta4 24,245 10/21/2016
6.4.0-beta3 71,408 7/4/2016
6.4.0-beta2 25,137 7/1/2016
6.4.0-beta10 23,340 1/30/2017
6.4.0-beta1 28,440 6/28/2016
6.3.4-alpha 424,681 6/1/2016
6.3.3-alpha 23,147 5/27/2016
6.2.1 5,369,372 2/26/2016
6.2.1-beta1 28,586 2/24/2016
6.2.0 170,970 2/22/2016
6.2.0-beta1 24,432 2/12/2016
6.1.0 430,402 1/18/2016
6.0.2 116,648 1/5/2016
6.0.1 39,888 1/5/2016
6.0.0 133,613 12/22/2015
5.6.2 1,596,535 5/29/2015
5.6.1 34,632 5/29/2015
5.5.0 1,209,924 10/31/2014
5.4.0 608,113 7/3/2014
5.3.0 105,191 5/27/2014
5.2.0 76,342 5/21/2014
5.1.0 1,045,438 3/11/2014
5.0.0.1 545,711 10/24/2013
4.0.0.1 302,297 7/18/2013
4.0.0 119,209 4/29/2013
3.4.6 416,514 8/30/2012
3.4.0 71,126 8/17/2012
3.3.1 91,674 3/30/2012
3.2.0 76,827 11/14/2011
3.1.0 53,032 7/30/2011
3.0.0.1 26,383 7/5/2011
3.0.0 46,926 6/25/2011
2.0.0 76,297 1/9/2011
1.3.0 393,941 1/7/2011

Changes in 7.5.2:
* RuleSet method can now take multiple ruleset names by usinga comma-separated string.
* Make setters on ValidationFailure's properties public to allow for easier deserialization.
* Additional overload for OverridePropertyName that takes an expression.
* Add overload of Include that takes a func to lazily create the inner validator.
* Make error code resolution pluggable using ValidatorOptions.ErrorCodeResolver
       
Changes in 7.5.1:
* Resolved issues with referencing FluentValidation from legacy PCLs.
* Added support for CustomizeValidatorAttribute to the legacy WebApi integration for consistency with MVC5 and AspNetCore.
Changes in 7.6:
* Update ASP.NET Core integration to ASP.NET Core 2.1

Changes in 7.5:
* Better handling of clientside messages when using custom overriden language resources
* Added flag in the ValidationContext's RootDataContext when a validator is invoked by the automatic MVC/WebApi integration
* Improvements to some of the validation tester's messages
* Added Transform method to transform property values prior to validation
* Improve support for DisplayAttribute / DisplayNameAttribute when inferring property display name
* New language translations (Slovak/Hebrew/Brazilian Portuguese)
* Cache display names by default
* Ensure ShouldHaveChildValidator test method works with model-level rules
* Removed netstandard1.0 support. Supported platforms are now netstandard1.1, netstandard2.0 and net45.

Changes in 7.4:
* Improved syntax for DependentRules
* ValidationException serialization support when running on full framework
* Added ComparisonProperty placeholder to some validators
* The Test Helper now correctly handles read-only properties
* Add CancellationToken support to ValidateAndThrowAsync and various ValidateAsync overloads
* Improved functionality for custom MessageBuilders
* Updated AspNetCore integration to MVC version 2.0.2
* Update MVC5 AddToModelState extension not to overwrite existing attempted values
* Added SetRulesetForClientsideMessages method for MVC5/AspNetCore as an alternative to using the RulesetForClientSideMessagesAttribute

Changes in 7.3:
* Major changes to AspNetCore integration including better support for collections and implicit validation (opt-in)
* Fix - Updated EnumValidator's Flags support to handle the ~0 value
* Fix - TestHelper checking for child validator would respond with the wrong type
* Fix - Updated translations for some validators
* Fix - Overload of WithName that takes a lambda generated an exception
* Added versions of WhenAsync and UnlessAsync that support CancellationTokens
* Simplify calls to DependentRules
* Add Skip property to CustomizeValidatorAttribute in the ASP.NET Core integration

Changes in 7.2:
* Updated AspNetCore integration to support IValidatableObject
* Updated AspNetCore integration to allow mixing multiple validation strategies in the same model
* Updated AspNetCore integration to support RulesetForClientsideMessagesAttribute
* Fix - Property names were not generated properly for nested types when using AddFailure inside a Custom validator
* Fix - NullReferenceException when using CustomAsync but the validator is invoked synchronously
* Fix - Clientside integration in AspNetCore being resolved from the root-level service provider
* Fix - Allow empty string to be passed to OverridePropertyName

Changes in 7.1.1:
* Fix - Incorrect property name was generated when using RuleForEach combined with SetValidator
* Fix - Nesting async validators inside DependentRules didn't wait for completion

Changes in 7.1:
* New RuleFor().Custom() method as a replacement for the old, deprecated Custom method
* Improved messages in the ShouldHaveChildValidator test extension
* Test helper works with nested properties
* Additional overload of WithState allows access to collection item when used with RuleForEach
* Fix - Wrong values were generated as part of the MVC5 clientside integration for MinLength and MaxLength validators
* Fix - AssemblyScanner now excludes abstract and generic types
* Fix - InvalidCastException when using lazy WithMessage combined with RuleForEach
* WithState enhanced to allow access to the ValidationContext

Changes in 7.0:

7.0 is a major release that contains several breaking changes, especially with Localization. If you use FluentValidation's support for localization please read the updated documentation: https://github.com/JeremySkinner/FluentValidation/wiki/f.-Localization

* Localization rewrite to not require satellite assemblies
* New 'Custom' rule method replaces the root-level Custom method
* Switch to Netstandard based build process
* Assemblies are now signed / strongly named - see https://github.com/JeremySkinner/FluentValidation/wiki/l.-Strong-naming-and-signed-packages
* Fix - Possible NullReferenceException in the AspNetCore clientside integration for length validators
* Fix - Don't clear the ModelValidatorProviders collection by default in the AspNetCore integration (added new ClearValidatorProviders property to control this behaviour)
* Fix - Ensure IValidatorFactory is resolved from request scope in asp.net core integration
* Fix - Property getter that throws an exception causes validation to fail in WebApi integration
* Fix - Issue in AspNetCore integration where we tried to resolve a collection validator in some situations where a class validator should be used
* Fix - Incorrect clientside validation attributes generated for email validator and credit card validator in the asp.net core integration
* Fix - Child model validation now works in webapi integration
* Improve splitting of PascalCased property names to support uppercase character sequences
* ValidationResult.ErrorCode property now always returns the type of the PropertyValidator that generated the message, unless it's been explicitly overriden

Full release notes can be found at https://github.com/JeremySkinner/FluentValidation/blob/master/Changelog.txt