microsoft-extensions-configuration

You can validate .NET configuration settings at startup by implementing IValidateOptions for complex rules or using Data Annotations for simple validation, ensuring strongly-typed settings classes are checked when the application initializes.

IOptions, IOptionsSnapshot, and IOptionsMonitor are .NET configuration patterns with different lifetimes. IOptions is a singleton, IOptionsSnapshot is scoped and recomputed per request, and IOptionsMonitor handles real-time configuration changes across the application lifecycle.

To bind configuration values to strongly-typed classes in .NET, use Microsoft.Extensions.Options patterns to map configuration sections directly to C# objects, enabling type-safe access and allowing validation through Data Annotations or custom IValidateOptions implementations.

Use IValidateOptions instead of Data Annotations when you need complex validation logic for settings that cannot be expressed with simple attributes. IValidateOptions allows you to implement custom rules, cross-field dependencies, and dynamic checks for your .NET configuration management.

Yes, this guide covers Microsoft.Extensions.DependencyInjection as a core dependency for setting up Microsoft.Extensions.Options patterns, alongside Microsoft.Extensions.Configuration, providing the necessary dependency injection framework to register and resolve strongly-typed settings.

Data Annotations are limited to simple validation rules for configuration properties and cannot easily handle cross-field dependencies or dynamic runtime checks. For complex .NET configuration validation logic, implementing the IValidateOptions interface is required to properly validate settings.