Concrete classes Must not be dependent on each other

Coupling

• The inter-dependency level of the classes, is called coupling. More is the dependency implies tight coupling & less is low coupling.

Benefits of DI

• Clean Code

Code is Easier to understand

• Better Re-usability

Low coupling Allows Modules to be Reused

• Better Unity Testing

Concrete classes can be replaced by mocks

• Low Coupling

Concrete classes can be replaced