#LISKOV SUBSTITUTION PRINCIPLE FULL#
#LISKOV SUBSTITUTION PRINCIPLE SOFTWARE#

Guiding software principles (of which only a partial set is mentioned here) will help keep the structure from outgrowing its foundation.

#LISKOV SUBSTITUTION PRINCIPLE FULL#

To make the smallest change requires full working knowledge of the entire system, and there’s little to keep it in check. You’ll soon find your top-level function has grown to an unwieldy size. You’ll take a top-down approach to your initial assignments in the world of hearty, corporate-sized software. Your schooling has taught you to think about problems from a top-down perspective. The professional development environment brings many challenges for aspiring software engineers. The examples are a bit silly with the goal of helping you recognize you can apply the SOLID principles to all forms of software. In this article, I’ll try to bridge that gap in a lighthearted way. Having worked with and trained many junior software engineers, I’ve discovered there’s a large gap between the first professional coding endeavors and sustainable code.

I hope to help amplify the application of these principles. Many other books and blog posts have explored and refined these principles. Martin, Michael Feathers, Bertrand Meyer, James Coplien and others, for sharing your wisdom with the rest of us. The SOLID acronym and the principles encompassed within did not originate with me. I’ll also assume some familiarity with the architectural terms Model and ViewModel. If you’re unfamiliar with the SOLID principles, you might want to review them quickly before proceeding. You should have some familiarity with these principles, as I’ll demonstrate a variety of C#-specific patterns that violate these principles. There have been some fantastic software development principles captured under the SOLID acronym-Single responsibility, Open for extension and closed for modification, Liskov substitution, Interface segregation, and Dependency injection. Indeed, you might value many helpful qualities in your computer code, but encounter the opposite on a daily basis. You may value computer code that doesn’t crash when you modify code in another location. Pattern refers to a common code scenario, whether good or bad.įor example, you might value computer code that works safely in a multi-threaded environment.

And when I say principle, I’m referring to a feature of the computer code that helps maintain the value of that code. Volume 29 Number 5 C# Best Practices : Dangers of Violating SOLID Principles in C#Īs the process of writing software has evolved from the theoretical realm into a true engineering discipline, a number of principles have emerged.

Liskov substitution principle