DependentRules() method for RuleSet() within abstractValidator

Is your feature request related to a problem? Please describe.

I’ve got multiple rules that should be met before I would like to validate some code. There’s When() method but I need to repeat my rules in conditional.

Describe the solution you’d like

DependentRules() method for RuleSet() within abstractValidator. Example:

RuleSet(()=>{
RuleFor(d => d.NotificationType).NotEmpty().WithMessage("Required");
RuleFor(<some-other-rule-in-other-property>);
}).DependentRules(()=> {
    RuleFor(d => d.NotificationEmail).EmailAddress().WithMessage("Invalid Email Address");
    RuleFor(d => d.NotificationEmail).NotEmpty().WithMessage("Required");
});

Describe alternatives you’ve considered

There is alternative like this:

RuleFor(d => d.NotificationType).NotEmpty().WithMessage("Required");

When(d => !string.IsNullOrEmpty(d.NotificationType) && d.NotificationType.ToUpper() == "EMAIL", () =>
{
    RuleFor(d => d.NotificationEmail).EmailAddress().WithMessage("Invalid Email Address");
    RuleFor(d => d.NotificationEmail).NotEmpty().WithMessage("Required");

});

but I don’t like this because of violating of DRY principle.

Additional Context

No response

[JeremySkinner]

Use case is explained in the documentation: https://docs.fluentvalidation.net/en/latest/rulesets.html

[JeremySkinner]

That’s not something I’d be interested in supporting. The existing When(lambda) is sufficient for this use case.