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Refactoring with C#

Refactoring with C#

By : Matt Eland
5 (9)
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Refactoring with C#

Refactoring with C#

5 (9)
By: Matt Eland

Overview of this book

Software projects start as brand-new greenfield projects, but invariably become muddied in technical debt far sooner than you’d expect. In Refactoring with C#, you'll explore what technical debt is and how it arises before walking through the process of safely refactoring C# code using modern tooling in Visual Studio and more recent C# language features using C# 12 and .NET 8. This book, written by a Microsoft MVP, will guide you through the process of refactoring safely through advanced unit testing with XUnit and libraries like Moq, Snapper, and Scientist .NET. You'll explore maintainable code through SOLID principles and defensive coding techniques made possible in newer versions of C#. You'll also find out how to run code analysis and write custom Roslyn analyzers to detect and resolve issues unique to your code. The nature of coding is changing, and you'll explore how to use AI with the GitHub Copilot Chat to refactor, test, document, and generate code before ending with a discussion about communicating technical debt to leadership and getting organizational buy-in to refactor your code in enterprise organizations and in agile teams. By the end of this book, you'll understand the nature of refactoring and see how you can safely, effectively, and repeatably pay down the technical debt in your application while adding value to your business.
Table of Contents (24 chapters)
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1
Part 1: Refactoring with C# in Visual Studio
7
Part 2: Refactoring Safely
13
Part 3: Advanced Refactoring with AI and Code Analysis
18
Part 4: Refactoring in the Enterprise

Refactoring for better encapsulation

Another core tenet of object-oriented programming is encapsulation. With encapsulation, you assert control of the data in your classes and ensure others work with data in ways that make sense both immediately and as the code grows over time.

The following refactorings deal with the various pieces of data composing classes along with the data passed along to methods as parameters.

Encapsulating fields

The simplest encapsulation refactoring allows you to wrap all uses of a field into a property.

In the following code example, the PassengerFlightInfo class has a _passengers field storing the count of passengers on the flight, and this field is used throughout the class when referring to the passenger count:

public class PassengerFlightInfo : FlightInfoBase {
  private int _passengers;
  public void Load(int passengers) =>
    _passengers = passengers;
  public void Unload() =>
...

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