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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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Free Chapter
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

Instantiating objects

Now that we’ve sufficiently improved our CanPassengerBoard method, let’s look at how we can create objects and see a few simple improvements you can make that will simplify object instantiation in your code.

Terminology notes

New developers are often tripped up by a handful of phrases that are commonly used by developers. For example, in this section, we will talk about instantiating objects. This is a common way of phrasing this for developers, but all it means is the process of creating a specific instance of a class using the new keyword. When you see the term instantiating, you can think of it simply as creating a specific instance of something.

This section’s code could come from anywhere, but we’ll focus on code found in a pair of methods in the PassengerTests.cs file in the test project that accompanies this chapter.

Replacing var with explicit Types

The first line of code I want to focus on comes from one of our...

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