ASP.NET Core in Action

Chapter 19. Building custom components

This chapter covers

• Building custom middleware and branching middleware pipelines
• Using configuration values to set up other configuration providers
• Replacing the built-in DI container with a third-party container
• Creating custom Razor Tag Helpers and view components
• Creating a custom DataAnnotations validation attribute

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 MVC 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 ...