Services are objects that are shared between middleware components and endpoints. There are no restrictions on the features that services can provide, but they are usually used for tasks that are needed in multiple parts of the application, such as logging or database access.
The ASP.NET Core dependency injection feature is used to create and consume services. This is a topic that causes confusion and can be difficult to understand. In this chapter, I describe the problems that dependency injection solves and explain how dependency injection is supported by the ASP.NET Core platform. Table 14-1
