RelatedList validated with data annotations

DevForce won't automatically perform validation on a RelatedEntityList. You can instead try doing the validation on the scalar side of the relationship, adding the annotation on either, or both, the scalar navigation property and the corresponding FK property.

You can also try adding a "BeforeGet" or "AfterGet" property interceptor for your RelatedEntityList. Within the interceptor you can then force validation on the entity or specific properties, or perform other actions. Setter interceptors aren't provided for these properties.

What sort of validation do you want to provide on the list?