Understanding Configuration and Service Registration in ASP.NET Core: Builder vs. Application Level
ln an ASP.NET Core application, why are some configurations and services only allowed to be added at the builder level, while others can be configured at the application level during instantiation? What are the key differences between the builder and application levels in terms of configuration and service registration, and why does this distinction exist?
Tuhin PaulPosted Aug 11, 2024, 3:24 PM
In ASP.NET Core, the builder and application levels refer to two different stages of the application's lifecycle:
Builder Level (WebApplicationBuilder):
This is the initial stage where you configure and register services for your application. It's where you add services, middleware, and configurations that will be used by the application. The builder is used to create the application's service provider, which is responsible for resolving dependencies.
Application Level (WebApplication):
This is the stage where the application is built and ready to run. You can configure middleware, routes, and other application-specific settings here.