Our next major release (13.2), updates our Validation Module with more features that come with different behavior rules, such as Warnings and Information. These can be applied to your existing validation rules using code or the Model Editor. The XAF validation module is a mature and flexible validation system, which allows you to create rules ...

Today i stump again upon the same problem . I wanted to throw a validation exception only if both of my properties do not have value. So lets create a validation rule for this one. More info on how we create custom validation rules can be found here Validation Module Since we are talking about multiple property values i think we should go with an ...