Solid Principles Introduction

The SOLID principles are a set of five design guidelines in object-oriented programming that aim to help developers create maintainable, flexible, and understandable code. By following these principles, software can be better organized, less prone to errors, and easier to extend as new requirements emerge. In this article, we'll explore how the SOLID principles apply in the context of .NET C# development.

Why there is need to know SOLID principles ?

When developers start building applications, they often rely on their experience and intuition. Initially, the code might work well, but as the application grows or evolves, it can become difficult to maintain. This typically happens when there are constant changes to features, or bugs arise that require major redesigns. Over time, these changes may create a system that is tightly coupled and difficult to understand.

The SOLID principles helps to prevent such scenarios. They provide guidelines for organizing code in a way that future changes can be implemented with minimal disruption. By following SOLID, you can ensure that the software remains scalable and maintainable, which is critical as new requirements and modules are added over time.

Robert C. Martin introduced the SOLID principles in the 1990s to promote better software architecture. The principles are designed to address issues like tight coupling, poor modularity, and lack of encapsulation, leading to more flexible and business-driven software solutions. The five SOLID principles are:

• S: Single Responsibility Principle (SRP)
• O: Open-Closed Principle (OCP)
• L: Liskov Substitution Principle (LSP)
• I: Interface Segregation Principle (ISP)
• D: Dependency Inversion Principle (DIP)

These S.O.L.I.D Principles are very important in building web/mobile applications. Lets go through each Principle one by one for more understanding with examples in up coming Lessons.