Software Architect's Handbook

Inversion of Control (IoC)

Inversion of Control (IoC) is a design principle in which a software system receives the flow of control from reusable code, such as a framework. In traditional procedural programming, a software system would call into a reusable library. The IOC principle inverts this flow of control by allowing the reusable code to call into the software system.

Developers are now so familiar with using a variety of frameworks, and even multiple frameworks on a single project, that the principle of IoC is no longer a novel one. Although the principle of IoC can be applied to many more things than just dependencies, it has become closely related to dependencies for its IOC over them.

This is the reason why DI containers were originally, ...