Summary
This chapter explored the Options pattern, a powerful tool allowing us to configure our ASP.NET Core applications. It enables us to change the application without altering the code. The capability even allows the application to reload the options at runtime when a configuration file is updated without downtime.
We learned how to load settings from multiple sources, with the last loaded source overriding previous values. We discovered the following interfaces to access settings and learned that the choice of interface influences the lifetime of the options object:
IOptionsMonitor<TOptions>IOptionsFactory<TOptions>IOptionsSnapshot<TOptions>IOptions<TOptions>
We delved into manually configuring options in the composition root and loading them from a settings file. We also learned how to inject options into a class and configure multiple instances of the same options type using named options. We explored encapsulating...
