FluentValidation 8.1.0-preview2

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

Showing the top 20 packages that depend on FluentValidation.

Packages Downloads
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
152
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
153
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
160
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
164
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
176
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
186
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
370
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
567
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
1,138
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
154
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
176
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
203
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
399
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
405
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
194
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
211
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
276
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
520
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
574

FluentValidation 8 is a major release. Please read the upgrade notes at https://fluentvalidation.net/upgrading-to-8 Changes in 8.1: * Add format support in message placeholders. * Added support for overriding indexers for collection rules. * Allow error codes to be used to override localization key in the Language Manager. * Additional error details are now shown in the ShouldNotHaveValidationErrorFor test extension. * Conditions defined with root-level When/WhenAsync/Unless/UnlessAsync are now only executed once (instead of once for each rule). * Support Otherwise method chained from root-level When/WhenAsync/Unless/UnlessAsync. * Minor wording changes to default English error messages. Changes in 8.0: * Support validating only specific properties by path. * Added OnFailure method * Deprecated RuleFor(..).SetCollectionValidator in favour of RuleForEach(...).SetValidator * IStringSource.GetString now takes a validation context instead of a model instance. * Introduce PropertyValidatorOptions in order to clean up the IPropretyValidator interface. * Moved the legacy ValidatorAttribute and AttributedValidatorFactory into a separate FluentValidation.Attributes package. * Remove the pre-7.0 localization mechanism * Remove the pre-7.0 methods for custom validation * Removed many other deprecated methods Full release notes can be found at https://github.com/JeremySkinner/FluentValidation/blob/master/Changelog.txt

Version Downloads Last updated
12.1.1 116 12/04/2025
12.1.0 201 11/04/2025
12.0.0 341 05/06/2025
12.0.0-preview1 103 01/03/2025
11.12.0 72 11/07/2025
11.11.0 308 11/20/2024
11.10.0 358 09/20/2024
11.9.2 266 06/27/2024
11.9.1 132 07/22/2024
11.9.0 281 02/05/2024
11.8.1 165 07/22/2024
11.8.0 127 07/22/2024
11.7.1 112 07/22/2024
11.7.0 123 07/22/2024
11.6.0 131 07/22/2024
11.5.2 119 07/22/2024
11.5.1 277 02/04/2024
11.5.0 116 07/22/2024
11.4.0 119 07/17/2024
11.3.0 146 02/04/2024
11.2.2 123 07/22/2024
11.2.1 133 07/22/2024
11.2.0 132 07/22/2024
11.1.1 122 07/22/2024
11.1.0 124 07/13/2024
11.0.3 137 07/22/2024
11.0.2 123 07/22/2024
11.0.1 117 07/22/2024
11.0.0 127 07/22/2024
10.4.0 223 02/04/2024
10.3.6 120 07/22/2024
10.3.5 111 07/22/2024
10.3.4 135 07/17/2024
10.3.3 134 07/17/2024
10.3.1 135 07/22/2024
10.3.0 116 05/29/2024
10.2.3 135 07/22/2024
10.2.2 115 07/22/2024
10.2.1 112 07/22/2024
10.2.0 126 07/22/2024
10.1.0 130 07/22/2024
10.0.4 142 07/22/2024
9.5.4 139 07/22/2024
9.5.3 120 07/22/2024
9.5.2 129 07/22/2024
9.5.1 115 07/22/2024
9.5.0 135 02/09/2024
9.4.0 123 07/22/2024
9.3.0 137 07/22/2024
9.3.0-preview3 131 07/22/2024
9.3.0-preview2 123 07/22/2024
9.3.0-preview1 148 07/22/2024
9.2.2 122 07/22/2024
9.2.1 121 07/18/2024
9.2.0 111 07/22/2024
9.1.3 139 07/22/2024
9.1.2 119 07/22/2024
9.1.1 112 07/22/2024
9.1.0 124 07/22/2024
9.0.1 130 07/22/2024
9.0.0-preview5 138 07/22/2024
9.0.0-preview4 119 07/22/2024
9.0.0-preview3 134 07/22/2024
9.0.0-preview2 117 07/22/2024
9.0.0-preview1 127 07/22/2024
8.6.3 134 07/22/2024
8.6.2 119 07/22/2024
8.6.1 122 07/22/2024
8.6.0 122 07/22/2024
8.5.1 127 07/21/2024
8.5.0 129 07/18/2024
8.5.0-preview5 132 07/22/2024
8.5.0-preview4 123 07/22/2024
8.5.0-preview3 123 07/22/2024
8.5.0-preview2 132 07/22/2024
8.5.0-preview1 118 07/22/2024
8.4.0 129 07/22/2024
8.3.0 127 07/22/2024
8.2.3 122 07/22/2024
8.2.2 120 07/22/2024
8.2.1 123 07/22/2024
8.2.0 133 07/22/2024
8.1.3 141 07/22/2024
8.1.2 113 07/22/2024
8.1.1 120 07/22/2024
8.1.0 143 07/22/2024
8.1.0-preview2 124 07/22/2024
8.1.0-preview1 132 07/22/2024
8.0.101 129 07/22/2024
8.0.100 118 07/17/2024
8.0.0 122 07/22/2024
8.0.0-rc1 137 07/22/2024
8.0.0-preview4 122 07/22/2024
8.0.0-preview3 128 07/22/2024
8.0.0-preview2 130 07/22/2024
7.6.105 119 07/22/2024
7.6.104 125 07/22/2024
7.6.103 122 07/22/2024
7.6.102 122 07/22/2024
7.6.101 121 07/22/2024
7.6.100 130 07/22/2024
7.6.0 141 07/22/2024
7.6.0-preview1 134 07/22/2024
7.5.2 121 07/22/2024
7.5.1 116 06/21/2024
7.5.0 130 07/22/2024
7.4.0 131 07/22/2024
7.3.4 124 07/22/2024
7.3.3 136 07/22/2024
7.3.2 119 07/22/2024
7.3.1 122 07/22/2024
7.3.0 121 07/22/2024
7.3.0-beta3 134 07/22/2024
7.3.0-beta2 130 07/22/2024
7.3.0-beta1 137 07/22/2024
7.2.1 131 07/22/2024
7.2.0 119 07/22/2024
7.2.0-beta3 123 07/22/2024
7.2.0-beta2 137 07/22/2024
7.2.0-beta1 155 07/22/2024
7.1.1 121 07/22/2024
7.1.0 116 07/22/2024
7.1.0-beta1 122 07/22/2024
7.0.3 124 07/22/2024
7.0.2 116 07/22/2024
7.0.1 141 07/22/2024
7.0.0 122 07/22/2024
7.0.0-beta3 117 07/22/2024
7.0.0-beta2 128 07/22/2024
7.0.0-beta1 109 07/22/2024
6.4.1 139 07/22/2024
6.4.1-beta1 154 07/22/2024
6.4.0 126 07/22/2024
6.4.0-rc4 146 07/22/2024
6.4.0-rc3 122 07/22/2024
6.4.0-rc2 137 07/22/2024
6.4.0-rc1 134 07/22/2024
6.4.0-beta9 158 07/22/2024
6.4.0-beta8 166 07/22/2024
6.4.0-beta7 128 07/22/2024
6.4.0-beta6 136 07/22/2024
6.4.0-beta5 136 07/22/2024
6.4.0-beta4 132 07/22/2024
6.4.0-beta3 134 07/22/2024
6.4.0-beta2 130 07/22/2024
6.4.0-beta10 144 07/22/2024
6.4.0-beta1 112 07/22/2024
6.3.4-alpha 131 07/22/2024
6.3.3-alpha 120 07/22/2024
6.2.1 128 07/22/2024
6.2.1-beta1 130 07/22/2024
6.2.0 123 07/22/2024
6.2.0-beta1 129 07/22/2024
6.1.0 125 07/22/2024
6.0.2 114 07/22/2024
6.0.1 118 07/22/2024
6.0.0 129 07/22/2024
5.6.2 130 07/22/2024
5.6.1 129 07/22/2024
5.5.0 134 07/22/2024
5.4.0 133 07/22/2024
5.3.0 129 07/21/2024
5.2.0 126 07/22/2024
5.1.0 133 07/22/2024
5.0.0.1 126 07/22/2024
4.0.0.1 128 07/22/2024
4.0.0 137 07/22/2024
3.4.6 121 07/22/2024
3.4.0 152 07/22/2024
3.3.1 145 07/22/2024
3.2.0 144 07/22/2024
3.1.0 131 07/22/2024
3.0.0.1 115 07/22/2024
3.0.0 143 07/22/2024
2.0.0 116 07/22/2024
1.3.0 126 07/22/2024