FluentValidation

Strongly-typed validation rules.

What is FluentValidation

FluentValidation keeps validation logic out of your models in dedicated, testable validator classes.

Install

dotnet add package FluentValidation

Usage

public class UserValidator : AbstractValidator<User> {
    public UserValidator() {
        RuleFor(x => x.Email).NotEmpty().EmailAddress();
        RuleFor(x => x.Age).InclusiveBetween(18, 120);
    }
}

Docs

Official documentation: FluentValidation.