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
175
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
177
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
178
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
186
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
202
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
212
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
426
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
744
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
1,177
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
175
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
196
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
229
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
431
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
505
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.
212
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.
231
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.
298
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.
591
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.
677

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
12.1.1 227 12/04/2025
12.1.0 245 11/04/2025
12.0.0 373 05/06/2025
12.0.0-preview1 129 01/03/2025
11.12.0 102 11/07/2025
11.11.0 371 11/20/2024
11.10.0 397 09/20/2024
11.9.2 290 06/27/2024
11.9.1 154 07/22/2024
11.9.0 313 02/05/2024
11.8.1 195 07/22/2024
11.8.0 156 07/22/2024
11.7.1 131 07/22/2024
11.7.0 142 07/22/2024
11.6.0 159 07/22/2024
11.5.2 149 07/22/2024
11.5.1 306 02/04/2024
11.5.0 144 07/22/2024
11.4.0 148 07/17/2024
11.3.0 169 02/04/2024
11.2.2 154 07/22/2024
11.2.1 162 07/22/2024
11.2.0 156 07/22/2024
11.1.1 146 07/22/2024
11.1.0 152 07/13/2024
11.0.3 160 07/22/2024
11.0.2 150 07/22/2024
11.0.1 141 07/22/2024
11.0.0 151 07/22/2024
10.4.0 257 02/04/2024
10.3.6 144 07/22/2024
10.3.5 131 07/22/2024
10.3.4 162 07/17/2024
10.3.3 157 07/17/2024
10.3.1 163 07/22/2024
10.3.0 145 05/29/2024
10.2.3 164 07/22/2024
10.2.2 142 07/22/2024
10.2.1 130 07/22/2024
10.2.0 149 07/22/2024
10.1.0 153 07/22/2024
10.0.4 168 07/22/2024
9.5.4 166 07/22/2024
9.5.3 146 07/22/2024
9.5.2 157 07/22/2024
9.5.1 141 07/22/2024
9.5.0 161 02/09/2024
9.4.0 151 07/22/2024
9.3.0 158 07/22/2024
9.3.0-preview3 159 07/22/2024
9.3.0-preview2 147 07/22/2024
9.3.0-preview1 178 07/22/2024
9.2.2 144 07/22/2024
9.2.1 143 07/18/2024
9.2.0 138 07/22/2024
9.1.3 164 07/22/2024
9.1.2 145 07/22/2024
9.1.1 138 07/22/2024
9.1.0 148 07/22/2024
9.0.1 153 07/22/2024
9.0.0-preview5 161 07/22/2024
9.0.0-preview4 138 07/22/2024
9.0.0-preview3 155 07/22/2024
9.0.0-preview2 139 07/22/2024
9.0.0-preview1 148 07/22/2024
8.6.3 156 07/22/2024
8.6.2 142 07/22/2024
8.6.1 142 07/22/2024
8.6.0 149 07/22/2024
8.5.1 149 07/21/2024
8.5.0 151 07/18/2024
8.5.0-preview5 152 07/22/2024
8.5.0-preview4 153 07/22/2024
8.5.0-preview3 149 07/22/2024
8.5.0-preview2 160 07/22/2024
8.5.0-preview1 142 07/22/2024
8.4.0 160 07/22/2024
8.3.0 156 07/22/2024
8.2.3 146 07/22/2024
8.2.2 145 07/22/2024
8.2.1 146 07/22/2024
8.2.0 156 07/22/2024
8.1.3 165 07/22/2024
8.1.2 139 07/22/2024
8.1.1 143 07/22/2024
8.1.0 167 07/22/2024
8.1.0-preview2 153 07/22/2024
8.1.0-preview1 154 07/22/2024
8.0.101 151 07/22/2024
8.0.100 142 07/17/2024
8.0.0 142 07/22/2024
8.0.0-rc1 156 07/22/2024
8.0.0-preview4 142 07/22/2024
8.0.0-preview3 149 07/22/2024
8.0.0-preview2 155 07/22/2024
7.6.105 137 07/22/2024
7.6.104 146 07/22/2024
7.6.103 144 07/22/2024
7.6.102 146 07/22/2024
7.6.101 149 07/22/2024
7.6.100 153 07/22/2024
7.6.0 160 07/22/2024
7.6.0-preview1 156 07/22/2024
7.5.2 143 07/22/2024
7.5.1 145 06/21/2024
7.5.0 149 07/22/2024
7.4.0 158 07/22/2024
7.3.4 141 07/22/2024
7.3.3 158 07/22/2024
7.3.2 145 07/22/2024
7.3.1 144 07/22/2024
7.3.0 147 07/22/2024
7.3.0-beta3 159 07/22/2024
7.3.0-beta2 153 07/22/2024
7.3.0-beta1 162 07/22/2024
7.2.1 153 07/22/2024
7.2.0 144 07/22/2024
7.2.0-beta3 145 07/22/2024
7.2.0-beta2 157 07/22/2024
7.2.0-beta1 175 07/22/2024
7.1.1 142 07/22/2024
7.1.0 136 07/22/2024
7.1.0-beta1 147 07/22/2024
7.0.3 148 07/22/2024
7.0.2 140 07/22/2024
7.0.1 161 07/22/2024
7.0.0 140 07/22/2024
7.0.0-beta3 145 07/22/2024
7.0.0-beta2 153 07/22/2024
7.0.0-beta1 135 07/22/2024
6.4.1 165 07/22/2024
6.4.1-beta1 178 07/22/2024
6.4.0 152 07/22/2024
6.4.0-rc4 179 07/22/2024
6.4.0-rc3 148 07/22/2024
6.4.0-rc2 163 07/22/2024
6.4.0-rc1 161 07/22/2024
6.4.0-beta9 192 07/22/2024
6.4.0-beta8 188 07/22/2024
6.4.0-beta7 150 07/22/2024
6.4.0-beta6 161 07/22/2024
6.4.0-beta5 166 07/22/2024
6.4.0-beta4 161 07/22/2024
6.4.0-beta3 159 07/22/2024
6.4.0-beta2 158 07/22/2024
6.4.0-beta10 171 07/22/2024
6.4.0-beta1 136 07/22/2024
6.3.4-alpha 156 07/22/2024
6.3.3-alpha 143 07/22/2024
6.2.1 152 07/22/2024
6.2.1-beta1 153 07/22/2024
6.2.0 146 07/22/2024
6.2.0-beta1 155 07/22/2024
6.1.0 155 07/22/2024
6.0.2 140 07/22/2024
6.0.1 150 07/22/2024
6.0.0 151 07/22/2024
5.6.2 153 07/22/2024
5.6.1 147 07/22/2024
5.5.0 159 07/22/2024
5.4.0 154 07/22/2024
5.3.0 154 07/21/2024
5.2.0 147 07/22/2024
5.1.0 157 07/22/2024
5.0.0.1 146 07/22/2024
4.0.0.1 153 07/22/2024
4.0.0 158 07/22/2024
3.4.6 141 07/22/2024
3.4.0 178 07/22/2024
3.3.1 170 07/22/2024
3.2.0 165 07/22/2024
3.1.0 156 07/22/2024
3.0.0.1 140 07/22/2024
3.0.0 167 07/22/2024
2.0.0 138 07/22/2024
1.3.0 155 07/22/2024