Design Patterns and Design Principals

Over the years software industry has evolved a lot. We have seen gigantic upgrade in computer hardware and software have evolved and become more and more complex. It is more important now than ever before that software developers write excellent quality code as they are responsible for automating everything from nuclear missiles to air radar systems. It is important that we adapt to the best design principals and patterns that have been developed over the years as they will aid us in writing better software for our customers.

26 06, 2020

Open Closed Principle Demystified

Open Closed Principle Demystified

By Afraz|2020-06-26T11:14:15+08:00June 26th, 2020|C#, Clean Code, Design Principles & Patterns|Comments Off on Open Closed Principle Demystified

If you are a developer, learning about SOLID Principles will enable you to write loosely coupled and maintainable code. In this video, I will cover the open-closed principle and show how we can use Strategy and Factory design patterns to solve the violation of this principle.

16 06, 2020

Single Responsibility Principle Demystified

Single Responsibility Principle Demystified

By Afraz|2020-06-16T11:19:23+08:00June 16th, 2020|C#, Design Principles & Patterns, Videos|Comments Off on Single Responsibility Principle Demystified

If you are a developer, learning about SOLID Principles will enable you to write loosely coupled and maintainable code. The Single responsibility principle is perhaps the most important SOLID design principle that you need to master to write better code. In this video, I explained what is the single responsibility principle, how to identify its violation in code, and how to apply it at different levels.

9 09, 2016

Readable, maintainable tests using the builder pattern

Readable, maintainable tests using the builder pattern

By Afraz|2019-04-13T10:22:19+08:00September 9th, 2016|C#, Design Principles & Patterns, TDD / BDD|Comments Off on Readable, maintainable tests using the builder pattern

One of the most important aspect of TDD is writing unit tests that are more readable and maintainable. Lot of people fail with TDD because when they add more unit tests to the code, they don’t put the effort to make them more readable and maintainable. I have seen cases where adding an extra dependency to a class would mean that the developers needs to modify 100 tests where they were creating an instance of that class. This is a [...]

16 02, 2015

Liskov Substitution Principle

Liskov Substitution Principle

By Afraz|2019-04-13T11:01:06+08:00February 16th, 2015|C#, Design Principles & Patterns|3 Comments

In the previous post I discussed the Open Close Principle, today I will talk about Liskov Substitution Principle. Liskov Substitution Principle is the third principle in SOLID principles. Original definition of Liskov Substitution Principle states that Let q(x) be a property provable about objects x of type T. Then q(y) should be provable for objects y of type S, where S is a subtype of T. This definition is not very clear to understand, later Robert C. Martin (Uncle [...]

16 02, 2015

Open Closed Principle

Open Closed Principle

By Afraz|2019-04-13T11:19:02+08:00February 16th, 2015|C#, Design Principles & Patterns|1 Comment

In the previous article, we discussed the Single Responsibility Principle. Today we are going to discuss the second SOLID Principle that is the Open Closed Principle. Open Closed Principle states that Software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification. In first look it might seem like a contradictory statement, how can a class be closed for modification but at the same time open for an extension? To answer this question take a [...]

14 09, 2014

Use Provider Pattern to Make Code More Extensible

Use Provider Pattern to Make Code More Extensible

By Afraz|2019-04-13T18:14:30+08:00September 14th, 2014|C#, Design Principles & Patterns|Comments Off on Use Provider Pattern to Make Code More Extensible

Provider pattern is an extremely useful pattern that allows you to write loosely coupled components in .Net framework. .Net CLR injects these components at run-time. The concept of provider model is very simple, yet extremely powerful. We create an abstraction for our components and define which concrete implementation we want to use in the configuration file. When the code executes, we can create an instance of the concrete component mentioned in the configuration file. Using a Provider for Logging Let's look at a simple [...]

25 04, 2014

Single Responsibility Principle

Single Responsibility Principle

By Afraz|2019-04-18T18:18:19+08:00April 25th, 2014|C#, Design Principles & Patterns|1 Comment

In modern day world just knowing how to write code is not enough. If you have ever played chess, you would know that the way grand masters play their game is totally different from the way novice or even intermediate players play. It has been proven scientifically that grand masters are always playing for patterns in a game of chess. When a beginner is faced in a position he just starts thinking of all the possible moves that he [...]