Options pattern
The options pattern is a .NET configuration pattern that represents related settings as strongly typed objects supplied through dependency injection.
ASP.NET Core in Action, 3e
The IOptions pattern is a .NET configuration pattern that represents application settings as strongly typed options objects obtained through dependency injection.
- How it is used
- Uses strongly typed settings to access feature configuration through dependency injection instead of string-key lookups.
- How deep it goes
- Explains POCO binding, injection, sequential configuration, OptionsBuilder, and service-backed configuration without covering validation or lifetime variants.
- Examples
- Demonstrates map and display settings, endpoint injection, currency binding, lambda configuration, and an injected currency provider.
- What you can do after
- Apply it via dependency injection to consume typed settings and compose configuration from sections, code, or registered services.
Read how ASP.NET Core in Action, 3e explains options pattern →
Pro ASP.NET Core 7, Tenth Edition
The options pattern is a .NET configuration pattern that represents related settings in classes and registers those settings for access through dependency injection.
- How it is used
- Configures ASP.NET Core middleware and other services through grouped settings registered before the application is built.
- How deep it goes
- Works through registration, endpoint and constructor injection, and configuration-section binding; defers a detailed account of dependency injection.
- Examples
- Shows a location endpoint, class-based middleware, JSON-backed settings, session setup, an extra page route, and authentication redirects.
- What you can do after
- Operate/configure ASP.NET Core features by registering options, supplying configuration values, and reading them through `IOptions<T>`.
Read how Pro ASP.NET Core 7, Tenth Edition explains options pattern →
Related concepts
- middlewareconfigures · Middleware is an intermediate software component or layer that processes or mediates requests, messages, or operations between other components, often adding behavior or controlling their flow.
- RouteOptionsconfigures · RouteOptions is an ASP.NET Core options class that configures routing behavior, including route constraints and URL-generation conventions.
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