Dependency injection is just using passing your dependencies as interfaces, especially in the constructor. Nothing more. Dependency injection frameworks are DI

Dependency injection is just using passing your dependencies as interfaces, especially in the constructor. Nothing more. Dependency injection frameworks are DI combined with a service locator. Dependency Injection Frameworks have the same issues: - understanding what is going on is harder than injecting objects by hand. - you have limited control over object lifetimes (when objects are created and disposed). Permanent, scoped and transient might be enough most of the time for a web service, but as soon as you fire off tasks that can outlive the requests or when you use it in different circumstances like UI it’s getting a problem.