Am I missing something - is it possible to do cross field validation with the Validation Application Block?
If Field A is not null then Field A is valid
If Field A is somevalue then Field B is valid
I do not want to do SelfValidation as I want the validation to occur through binding - so when Field B loses focus run it's rule.
This is a pretty standard requirement and could easily be done using IDataErrorInfo implementation.
Any help welcomed