Configuring contextual options with Microsoft.Extensions.Options.Contextual

Microsoft.Extensions.Options.Contextual is a little-known, still-experimental .NET package that allows configuring options objects dynamically based on a runtime context object. The setup involves marking a context class with [OptionsContext] to trigger a source generator, implementing an IOptionsContextReceiver to extract relevant values, and wiring up a contextual configuration lambda. The author walks through the full setup with a weather forecast example, then questions the value of the abstraction — noting it introduces indirect coupling via magic strings rather than eliminating coupling. The package appears to have been conceived as a feature-flagging mechanism (with LaunchDarkly mentioned in API review notes), but it never left preview, has under 1000 downloads across all versions, and competes with the already-popular Microsoft.FeatureManagement. The author concludes the package is not worth adopting and suggests OpenFeature as an alternative for feature flagging needs.