FluentValidation 9.5.0
Prefix ReservedSee the version list below for details.
dotnet add package FluentValidation --version 9.5.0
NuGet\Install-Package FluentValidation -Version 9.5.0
<PackageReference Include="FluentValidation" Version="9.5.0" />
<PackageVersion Include="FluentValidation" Version="9.5.0" />
<PackageReference Include="FluentValidation" />
paket add FluentValidation --version 9.5.0
#r "nuget: FluentValidation, 9.5.0"
#:package FluentValidation@9.5.0
#addin nuget:?package=FluentValidation&version=9.5.0
#tool nuget:?package=FluentValidation&version=9.5.0
A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.
| Product | Versions Compatible and additional computed target framework versions. |
|---|---|
| .NET | net5.0 is compatible. 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 | netcoreapp2.0 was computed. netcoreapp2.1 was computed. netcoreapp2.2 was computed. netcoreapp3.0 was computed. netcoreapp3.1 was computed. |
| .NET Standard | netstandard2.0 is compatible. netstandard2.1 was computed. |
| .NET Framework | net461 is compatible. 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 | tizen40 was computed. tizen60 was computed. |
| Xamarin.iOS | xamarinios was computed. |
| Xamarin.Mac | xamarinmac was computed. |
| Xamarin.TVOS | xamarintvos was computed. |
| Xamarin.WatchOS | xamarinwatchos was computed. |
-
.NETFramework 4.6.1
- No dependencies.
-
.NETStandard 2.0
- No dependencies.
-
net5.0
- No dependencies.
NuGet packages (3.0K)
Showing the top 5 NuGet packages that depend on FluentValidation:
| Package | Downloads |
|---|---|
|
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation |
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FluentValidation.AspNetCore
AspNetCore integration for FluentValidation |
|
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Reo.Core.DataModels
Package Description |
|
|
Ocelot
Ocelot is an API gateway based on .NET stack. |
|
|
Reo.Core.Validation
Package Description |
GitHub repositories (221)
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 10
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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.
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kgrzybek/modular-monolith-with-ddd
Full Modular Monolith application with Domain-Driven Design approach.
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Sonarr/Sonarr
Smart PVR for newsgroup and bittorrent users.
|
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Radarr/Radarr
Movie organizer/manager for usenet and torrent users.
|
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|
aspnetboilerplate/aspnetboilerplate
ASP.NET Boilerplate - Web Application Framework
|
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dotnet-architecture/eShopOnWeb
Sample ASP.NET Core 8.0 reference application, now community supported: https://github.com/NimblePros/eShopOnWeb
|
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MudBlazor/MudBlazor
Blazor Component Library based on Material Design principles with an emphasis on ease of use and extensibility
|
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ThreeMammals/Ocelot
.NET API Gateway
|
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NancyFx/Nancy
Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono
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EduardoPires/EquinoxProject
Web Application ASP.NET 9 using Clean Architecture, DDD, CQRS, Event Sourcing and a lot of good practices
|
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canton7/SyncTrayzor
Windows tray utility / filesystem watcher / launcher for Syncthing
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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.
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FastEndpoints/FastEndpoints
A light-weight REST API development framework for ASP.NET 8 and newer.
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jasontaylordev/NorthwindTraders
Northwind Traders is a sample application built using ASP.NET Core and Entity Framework Core.
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Lidarr/Lidarr
Looks and smells like Sonarr but made for music.
|
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microsoft/RulesEngine
A fast and reliable .NET Rules Engine with extensive Dynamic expression support
|
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fullstackhero/blazor-starter-kit
Clean Architecture Template for Blazor WebAssembly Built with MudBlazor Components.
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Megabit/Blazorise
Blazorise is a component library built on top of Blazor with support for CSS frameworks like Bootstrap, Tailwind, Bulma, AntDesign, and Material.
|
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Readarr/Readarr
Book Manager and Automation (Sonarr for Ebooks)
|
| Version | Downloads | Last Updated |
|---|---|---|
| 12.1.1 | 1,884,049 | 12/3/2025 |
| 12.1.0 | 3,068,384 | 11/3/2025 |
| 12.0.0 | 23,927,099 | 5/5/2025 |
| 12.0.0-preview1 | 292,377 | 1/2/2025 |
| 11.12.0 | 460,300 | 11/3/2025 |
| 11.11.0 | 55,803,257 | 11/16/2024 |
| 11.10.0 | 22,658,013 | 9/15/2024 |
| 11.9.2 | 29,564,530 | 6/10/2024 |
| 11.9.1 | 15,098,403 | 4/23/2024 |
| 11.9.0 | 36,225,676 | 12/21/2023 |
| 11.8.1 | 10,458,103 | 11/22/2023 |
| 11.8.0 | 10,530,347 | 10/19/2023 |
| 11.7.1 | 12,672,749 | 8/12/2023 |
| 11.7.0 | 151,891 | 8/11/2023 |
| 11.6.0 | 9,673,445 | 7/4/2023 |
| 11.5.2 | 21,135,758 | 4/7/2023 |
| 11.5.1 | 72,612,921 | 2/20/2023 |
| 11.5.0 | 3,392,520 | 2/13/2023 |
| 11.4.0 | 20,865,693 | 11/23/2022 |
| 11.3.0 | 3,918,329 | 11/10/2022 |
| 11.2.2 | 17,765,623 | 9/11/2022 |
| 11.2.1 | 24,669,577 | 8/28/2022 |
| 11.2.0 | 8,009,960 | 8/8/2022 |
| 11.1.1 | 700,110 | 8/6/2022 |
| 11.1.0 | 14,019,507 | 6/22/2022 |
| 11.0.3 | 3,812,267 | 6/10/2022 |
| 11.0.2 | 5,841,454 | 5/27/2022 |
| 11.0.1 | 7,117,796 | 5/7/2022 |
| 11.0.0 | 7,429,046 | 4/30/2022 |
| 10.4.0 | 22,256,608 | 3/11/2022 |
| 10.3.6 | 28,633,796 | 12/13/2021 |
| 10.3.5 | 3,357,085 | 11/30/2021 |
| 10.3.4 | 10,779,208 | 10/22/2021 |
| 10.3.3 | 12,733,261 | 8/24/2021 |
| 10.3.1 | 764,193 | 8/19/2021 |
| 10.3.0 | 8,916,606 | 7/9/2021 |
| 10.2.3 | 8,916,230 | 6/3/2021 |
| 10.2.2 | 483,736 | 6/1/2021 |
| 10.2.1 | 1,409,126 | 5/30/2021 |
| 10.2.0 | 399,180 | 5/28/2021 |
| 10.1.0 | 5,766,857 | 4/28/2021 |
| 10.0.4 | 4,432,921 | 4/17/2021 |
| 9.5.4 | 8,088,949 | 4/5/2021 |
| 9.5.3 | 4,191,478 | 3/15/2021 |
| 9.5.2 | 2,104,396 | 3/8/2021 |
| 9.5.1 | 6,986,467 | 2/11/2021 |
| 9.5.0 | 3,552,036 | 1/31/2021 |
| 9.4.0 | 3,207,919 | 1/14/2021 |
| 9.3.0 | 15,451,244 | 11/10/2020 |
| 9.3.0-preview3 | 40,259 | 10/19/2020 |
| 9.3.0-preview2 | 156,039 | 9/15/2020 |
| 9.3.0-preview1 | 13,833 | 8/26/2020 |
| 9.2.2 | 7,372,843 | 9/20/2020 |
| 9.2.1 | 34,393 | 9/19/2020 |
| 9.2.0 | 8,298,602 | 8/26/2020 |
| 9.1.3 | 1,053,297 | 8/19/2020 |
| 9.1.2 | 1,005,568 | 8/12/2020 |
| 9.1.1 | 691,292 | 8/8/2020 |
| 9.1.0 | 338,001 | 8/8/2020 |
| 9.0.1 | 5,756,483 | 7/14/2020 |
| 9.0.0-preview5 | 91,004 | 5/23/2020 |
| 9.0.0-preview4 | 147,776 | 4/22/2020 |
| 9.0.0-preview3 | 211,099 | 2/29/2020 |
| 9.0.0-preview2 | 32,803 | 2/21/2020 |
| 9.0.0-preview1 | 102,143 | 2/8/2020 |
| 8.6.3 | 8,209,403 | 8/28/2020 |
| 8.6.2 | 29,925,544 | 2/29/2020 |
| 8.6.1 | 13,513,601 | 12/28/2019 |
| 8.6.0 | 4,467,409 | 12/4/2019 |
| 8.5.1 | 4,008,623 | 11/2/2019 |
| 8.5.0 | 6,840,836 | 9/24/2019 |
| 8.5.0-preview5 | 71,282 | 9/1/2019 |
| 8.5.0-preview4 | 103,971 | 7/23/2019 |
| 8.5.0-preview3 | 32,881 | 7/10/2019 |
| 8.5.0-preview2 | 90,907 | 6/13/2019 |
| 8.5.0-preview1 | 65,302 | 5/10/2019 |
| 8.4.0 | 15,336,553 | 5/10/2019 |
| 8.3.0 | 4,269,283 | 4/24/2019 |
| 8.2.3 | 756,983 | 4/12/2019 |
| 8.2.2 | 1,181,045 | 4/5/2019 |
| 8.2.1 | 511,065 | 4/4/2019 |
| 8.2.0 | 1,132,271 | 3/26/2019 |
| 8.1.3 | 5,277,251 | 1/25/2019 |
| 8.1.2 | 2,433,209 | 12/18/2018 |
| 8.1.1 | 627,640 | 12/11/2018 |
| 8.1.0 | 858,236 | 12/6/2018 |
| 8.1.0-preview2 | 29,993 | 11/14/2018 |
| 8.1.0-preview1 | 28,432 | 10/14/2018 |
| 8.0.101 | 974,606 | 11/24/2018 |
| 8.0.100 | 4,215,405 | 9/4/2018 |
| 8.0.0 | 1,210,489 | 8/16/2018 |
| 8.0.0-rc1 | 54,761 | 7/24/2018 |
| 8.0.0-preview4 | 26,209 | 7/16/2018 |
| 8.0.0-preview3 | 24,839 | 7/13/2018 |
| 8.0.0-preview2 | 24,680 | 7/13/2018 |
| 7.6.105 | 1,961,088 | 8/11/2018 |
| 7.6.104 | 2,852,585 | 7/6/2018 |
| 7.6.103 | 1,341,029 | 6/16/2018 |
| 7.6.102 | 347,626 | 6/14/2018 |
| 7.6.101 | 78,470 | 6/13/2018 |
| 7.6.100 | 183,524 | 6/7/2018 |
| 7.6.0 | 416,627 | 6/1/2018 |
| 7.6.0-preview1 | 53,775 | 4/12/2018 |
| 7.5.2 | 4,042,459 | 3/16/2018 |
| 7.5.1 | 286,975 | 3/11/2018 |
| 7.5.0 | 758,868 | 2/26/2018 |
| 7.4.0 | 2,466,633 | 1/26/2018 |
| 7.3.4 | 1,159,252 | 1/2/2018 |
| 7.3.3 | 201,884 | 12/22/2017 |
| 7.3.2 | 77,259 | 12/21/2017 |
| 7.3.1 | 354,077 | 12/13/2017 |
| 7.3.0 | 131,605 | 12/13/2017 |
| 7.3.0-beta3 | 28,702 | 12/8/2017 |
| 7.3.0-beta2 | 47,977 | 11/20/2017 |
| 7.3.0-beta1 | 25,511 | 11/11/2017 |
| 7.2.1 | 3,008,330 | 10/24/2017 |
| 7.2.0 | 859,433 | 10/5/2017 |
| 7.2.0-beta3 | 41,953 | 9/5/2017 |
| 7.2.0-beta2 | 27,783 | 8/22/2017 |
| 7.2.0-beta1 | 23,974 | 8/19/2017 |
| 7.1.1 | 2,513,503 | 7/25/2017 |
| 7.1.0 | 569,271 | 6/28/2017 |
| 7.1.0-beta1 | 23,749 | 6/24/2017 |
| 7.0.3 | 770,206 | 6/7/2017 |
| 7.0.2 | 294,870 | 5/26/2017 |
| 7.0.1 | 101,425 | 5/23/2017 |
| 7.0.0 | 771,890 | 5/19/2017 |
| 7.0.0-beta3 | 102,855 | 5/1/2017 |
| 7.0.0-beta2 | 27,446 | 4/17/2017 |
| 7.0.0-beta1 | 25,025 | 4/7/2017 |
| 6.4.1 | 2,403,461 | 3/15/2017 |
| 6.4.1-beta1 | 24,036 | 3/13/2017 |
| 6.4.0 | 1,106,567 | 3/3/2017 |
| 6.4.0-rc4 | 146,836 | 2/13/2017 |
| 6.4.0-rc3 | 39,993 | 2/3/2017 |
| 6.4.0-rc2 | 40,061 | 1/30/2017 |
| 6.4.0-rc1 | 23,850 | 1/30/2017 |
| 6.4.0-beta9 | 91,925 | 11/21/2016 |
| 6.4.0-beta8 | 50,853 | 10/31/2016 |
| 6.4.0-beta7 | 24,506 | 10/28/2016 |
| 6.4.0-beta6 | 24,792 | 10/25/2016 |
| 6.4.0-beta5 | 24,379 | 10/24/2016 |
| 6.4.0-beta4 | 24,483 | 10/21/2016 |
| 6.4.0-beta3 | 71,952 | 7/4/2016 |
| 6.4.0-beta2 | 25,364 | 7/1/2016 |
| 6.4.0-beta10 | 23,569 | 1/30/2017 |
| 6.4.0-beta1 | 28,781 | 6/28/2016 |
| 6.3.4-alpha | 444,105 | 6/1/2016 |
| 6.3.3-alpha | 23,362 | 5/27/2016 |
| 6.2.1 | 5,643,118 | 2/26/2016 |
| 6.2.1-beta1 | 28,838 | 2/24/2016 |
| 6.2.0 | 173,208 | 2/22/2016 |
| 6.2.0-beta1 | 24,687 | 2/12/2016 |
| 6.1.0 | 449,175 | 1/18/2016 |
| 6.0.2 | 119,284 | 1/5/2016 |
| 6.0.1 | 40,364 | 1/5/2016 |
| 6.0.0 | 137,486 | 12/22/2015 |
| 5.6.2 | 1,668,120 | 5/29/2015 |
| 5.6.1 | 35,189 | 5/29/2015 |
| 5.5.0 | 1,240,419 | 10/31/2014 |
| 5.4.0 | 617,486 | 7/3/2014 |
| 5.3.0 | 106,281 | 5/27/2014 |
| 5.2.0 | 77,864 | 5/21/2014 |
| 5.1.0 | 1,091,823 | 3/11/2014 |
| 5.0.0.1 | 575,460 | 10/24/2013 |
| 4.0.0.1 | 312,817 | 7/18/2013 |
| 4.0.0 | 122,924 | 4/29/2013 |
| 3.4.6 | 438,806 | 8/30/2012 |
| 3.4.0 | 73,553 | 8/17/2012 |
| 3.3.1 | 95,133 | 3/30/2012 |
| 3.2.0 | 79,688 | 11/14/2011 |
| 3.1.0 | 53,413 | 7/30/2011 |
| 3.0.0.1 | 26,643 | 7/5/2011 |
| 3.0.0 | 47,905 | 6/25/2011 |
| 2.0.0 | 78,892 | 1/9/2011 |
| 1.3.0 | 476,544 | 1/7/2011 |
FluentValidation 9 is a major release. Please read the upgrade notes at https://docs.fluentvalidation.net/en/latest/upgrading-to-9.html
Changes in 9.5.0:
* Introduce new syntax for applying transformations and deprecate the old syntax
Changes in 9.4.0:
* ChildRules now work as expected when inside a ruleset
* Added ImplicitlyValidateRootCollectionElements option to MVC integration
Changes in 9.3.0:
* Improvements to LanguageManager's lazy loading of resources.
* Deprecate IStringSource and its implementors. Use delegates instead.
* CustomizeValidatorAttribute now works in Razor pages (netcore 3.1 and net 5.0 only)
* RuleSetForClientSideMessagesAttribute now works in Razor pages (netcore 3.1 and net 5.0 only)
* Fixes to Spanish language translations.
Changes in 9.2.2:
* Fix one of the inheritance validator overloads not working correctly.
Changes in 9.2.1:
* Add non-generic Add method to inheritance validator.
* Updates to Persian translations.
* Added Bengali translations.
Changes in 9.2.0:
* Add inheritance validator
* Performance improvements
Changes in 9.1.3:
* Fix an issue with IncludeRulesNotInRuleSet not working correctly
Changes in 9.1.2:
* Make the ValidationContext.ThrowOnFailures getter public.
Changes in 9.1.1:
* Fix an incorrect deprecation message.
Changes in 9.1:
* Make ruleset separator character splitting consistent
* Transform now works with RuleForEach
* Introduce constants for rulesets
* Resolve issue when attempting to use asynchronous conditions in a synchornous validaiton run
* Added asynchronous versions of the TestHelper methods.
* Introduce CascadeMode.Stop and deprecate CascadeMode.StopOnFirstFailure to resolve confusion/abiguity about setting the cascade mode at validator-level (#1437)
* RaiseValidationException can be overridden to customize the exception throwing process
* Add new Validate extension methods that allow options to be configured using a strategy
Changes in 9.0.0:
* Removed support for netstandard1.1 and netstandard1.6
* Removed support for end-of-life .NET Core versions (2.2 and 3.0). LTS versions are supported (2.1 and 3.1)
* Default email validation mode now uses the same logic as ASP.NET Core. Previous regex behaviour is opt-in.
* TestHelper advanced mode now has more features (see https://docs.fluentvalidation.net/en/latest/testing.html#advanced-test-extensions)
* Equal/NotEqual now perform ordinal comparison when used with string properties
* Severity can now be set dynamically with a callback
* Removed WithLocalizedMessage (WithMessage that takes a callback is the replacement)
* Removed ResourceName from ValidationFailure
* Removed ResourceName and ResourceType from IStringSource.
* Removed SetCollectionValidator which was deprecated in 8.0
* Additional overload of OnAnyFailure that can receive a collection of validation failures
* Remove DisplayAttribute integration and reference to DataAnnotations.
* ComparisonProperty placeholder is now formatted like PropertyName
* Translations of default error messages into other languages are now lazily-loaded
* Added Slovenian translations of default error messages.
* Added Icelandic translations of default error messages.
* Added WithMessageArgument to the test helpers.
* Add additional overload of SetValidator that takes a Func that receives the current property value.
* ASP.NET Core: FluentValidationModelValidatorProvider and FluentValidationModelValidator are now public.
* Work around a bug in ASP.NET Core's integration testing components that can cause ConfigureServices to run multiple times.
* SourceLink integration.
* {CollectionIndex} placeholder can now be accessed in child validators.
* Additional ValidationException constructor that allows using both the default message and a custom one together.
* ScalePrecisionValidator algorithm now matches SQL Server.
* Additional overload of the When methods that contain the validation context.
* Automatically scanned types can be excluded when calling RegisterValidatorsFromAssemblyContaining in ASP.NET Core projects.
* New AutomaticValidationEnabled property for use in ASP.NET Core projects (defaults to true).
Full release notes can be found at https://github.com/FluentValidation/FluentValidation/blob/master/Changelog.txt