Introduction
Most customization examples that you will find in books and official articles will mainly focus on the basics to get you started. They seldom delve deeper into how to structure your code for clean code and best practices. Any customization you build--whether using JavaScript, C#, or any other language or framework--should follow best practices. Plugins, for example, can very easily get too large and difficult to maintain if no thought is put into structuring them properly.
In this chapter we will start by refactoring our one class C# plugins into three layers: entry point, business logic, and data access layer (DAL). We will also introduce design patterns, such as dependency injection, singleton, and factory. Most of the enhancements will leverage fundamental object-oriented paradigms including: inheritance, encapsulation, and polymorphism, among others. A basic understanding of these patterns and paradigms is recommended, but not necessary.
The first recipe is key to the rest...
