Answers

1. We can use one of the following interfaces: IOptionsMonitor<TOptions>, IOptionsFactory<TOptions>, IOptionsSnapshot<TOptions>, or IOptions<TOptions>.
2. The configuration and the post-configuration phases.
3. Configurators are executed in the order of their registration, so their order is crucial.
4. Yes, we can register as many configuration classes as we want.
5. Eager validation allows catching incorrectly configured options at startup time, which can prevent runtime issues.
6. We must implement the IValidateOptions<TOptions> interface.

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