Casey Wilkins questions

• How should a class library present a notification to the user/UI?
• SQL Query to delete oldest rows over a certain row count?
• Should security concerns be present in the domain model?
• How can I make a property "Write Once Read Many" in VB.NET?
• Should domain objects be allowed to be temporarily invalid, and how does that decision affect validation techniques?
• Is it possible to override a property and return a derived type in VB.NET?
• How do you implement a 3 layer model with NHibernate?
• Why not use an IoC container to resolve dependencies for entities/business objects?

Casey Wilkins answers