ValidationOptions.Localizer Property
Definition
Important
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Gets or sets the IValidationLocalizer used by the validation pipeline to resolve localized display names and error messages.
public:
property Microsoft::Extensions::Validation::IValidationLocalizer ^ Localizer { Microsoft::Extensions::Validation::IValidationLocalizer ^ get(); void set(Microsoft::Extensions::Validation::IValidationLocalizer ^ value); };public Microsoft.Extensions.Validation.IValidationLocalizer? Localizer { get; set; }member this.Localizer : Microsoft.Extensions.Validation.IValidationLocalizer with get, setPublic Property Localizer As IValidationLocalizerProperty Value
Remarks
When null (the default), no localization is performed: literal display names from Name and DisplayName are returned as-is, and validation error messages fall back to the attribute's default message.
To enable the default IStringLocalizer-based implementation, add a reference to Microsoft.Extensions.Validation.Localization and call services.AddValidationLocalization() during DI configuration. Alternatively, assign a custom IValidationLocalizer implementation directly.
This property is intended to be configured during application startup. Mutating it after the validation pipeline has begun processing requests is not thread-safe.
