With the introduction of Unity v1.2 it is now possible to do aspect oriented programming (AOP) using Unity in a way that is similar to Policy Injection. You can read all about it in my former post How-to AOP: Validation with Policy Injection, where I showed how-to AOP using Validation with the Policy Injection Application [...]
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Validation of user input is very important. A lot of our users are very environmentally aware and throw all kinds of garbage in (= garbage out). So you probably better use extensive validation for all your dataclasses (or Business Entities, if you like). A consequence is that you have to invoke validation almost everywhere in [...]
