This tutorial will make us understand SOLID Design Principles in Object-Oriented Programming.

Why design principles and design patterns are important?

Design principles are introduced based on the common issues that persisted a long way. These are the best practices, principles, or patterns that are time-tested. Design principles help you make your design simple, robust, and extensible.

Design patterns save us from re-inventing the wheel. Each pattern solves one kind of problem where we can directly use the required design pattern in the required scenario.

• Single Responsibility Principle
• Open-Closed Principle
• Liskov Substitution Principle
• Interface-Segregation Principle
• Dependency Inversion Principle