ASP.NET Core in Action, Second Edition

19 Building custom components

This chapter covers

• Building custom middleware
• Creating simple endpoints that generate a response using middleware
• Using configuration values to set up other configuration providers
• Replacing the built-in DI container with a third-party container

When you’re building apps with ASP.NET Core, most of your creativity and specialization goes into the services and models that make up your business logic and the Razor Pages and controllers that expose them through views or APIs. Eventually, however, you’re likely to find that you can’t quite achieve a desired feature using the components that come out of the box. At that point, you may need to build a custom component.

This chapter shows how you can create some ASP.NET ...