Extension for some rule

PropertyDTO and OtherDTO are from different inheritance hierarchies so, how could i write an extension function for replacing the RuleFor(p => p.Id).IdRule() so i do not have to repeat the p=>p.Id expression each of those DTOs with Id field?

public static class Extensions
{
    public static void IdRule<T>(this IRuleBuilder<T, int> @this)
    {
        @this.Must(id => id >= 1).WithMessage("Id is invalid.");
    }
}
public class PropertyDTOValidator : AbstractValidator<PropertyDTO>
{
    public PropertyDTOValidator ()
    {
        RuleFor(p => p.Id).IdRule();
    }
}
public class OtherDTOValidator : AbstractValidator<OtherDTO>
{
    public OtherDTOValidator ()
    {
        RuleFor(p => p.Id).IdRule();
    }
}

[JeremySkinner]

It is not possible without a common base class or interface.

[JeremySkinner]

You’d need to introduce an interface to make the property common for both types.