Overview

Liskov's Substitution Principle is the third of the five SOLID principles. The property is as follows :

Let φ(x) be a property provable about objects x of type T. Then φ(y) should also be true for objects y of type S where S is a subtype of T

In simple words,

1. Objects of a superclass should be able to be replaced with objects of a subclass without affecting the program.
2. Object of subclass should be able to access the all the methods and properties of the superclass.

Design

This project defines a Notifications Interface which have Send(). Two classes inherited from above, namely EmailNotification and SmsNotification implement the functions.

Environment

The project builds and runs with Visual Studio Community 2022 when the required workloads are installed.