I have read about Persistence Ignorance principle, The ebook give some examples of violations of this principle, but I don’t understand. Could you please help me to give some explain?
Some examples of violations of this principle include: • A required base class • A required interface implementation • Classes responsible for saving themselves (such as the Active Record pattern) • Required default constructor • Properties requiring virtual keyword • Properties forced to use certain types (for example, collection properties must expose ICollection, not just IEnumerable) • Persistence-specific required attributes
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