microsoft-extensions-configuration

SKILL.md

The Problem: Applications often fail at runtime due to misconfiguration - missing connection strings, invalid URLs, out-of-range values. These failures happen deep in business logic, far from where configuration is loaded, making debugging difficult.

The Solution: Validate configuration at startup. If configuration is invalid, the application fails immediately with a clear error message. This is the "fail fast" principle.

Key Point: .ValidateOnStart() is critical. Without it, validation only runs when the options are first accessed, which could be minutes or hours into application runtime.

Patrones Microsoft.Extensions.Options que incluyen IValidateOptions, configuraciones fuertemente tipadas, validación al inicio y el patrón Opciones para una administración de configuración limpia. Fuente: aaronontheweb/dotnet-skills.

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