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The Options pattern allows us to use classes to provide strongly typed configuration settings in our application at runtime. However, you have no guarantee that the configuration settings injected using IOptions will be read correctly from the application settings. In this video, I'll show you how to introduce validation in your IOptions and make sure the application settings are correct. You'll also see how to check that the options are correctly configured when the application starts.

Adding Validation to the Options Pattern in ASP.NET Core
https://www.milanjovanovic.tech/blog/adding-validation-to-the-options-pattern-in-asp-net-core

To use the Options pattern in ASP.NET Core 7:
https://www.milanjovanovic.tech/blog/how-to-use-the-options-pattern-in-asp-net-core-7

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Chapter
0:00 Configuring the option pattern
1:40 Checking the setting value
2:27 What could go wrong?
3:05 Add validation with data annotations
3:35 Configuring the options pattern for validation
5:20 Validate options at application startup
6:42 Adding custom validation rules

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