Software Architect's Handbook

Benefits of DI

DI removes hardcoded dependencies and allows them to be changed, at either runtime or compile-time. If the implementation of a dependency is determined at runtime rather than compile-time, this is known as late binding, or runtime binding. As long as we are programming to an interface, the implementation can be swapped out.

DI allows us to write loosely coupled code, making applications easier to maintain, extend, and test. As we know, when we need to make a change, loosely coupled code allows us to make a change in one part of our application without it affecting other areas of our application.

Testability increases in software applications that use DI. Loosely coupled code can be tested more easily. Code is written to depend ...