What is Dependency Inversion Principle?

The Dependency Inversion Principle (DIP) states that:

High-level modules should not depend on low-level modules. Both should

depend on abstractions.

Abstractions should not depend on details. Details should depend on

abstractions.

In other words:

• High-level business logic shouldn't depend on concrete implementations.
• Instead, both high- and low-level components should depend on interfaces or

abstract classes.