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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

Introducing static methods and extension methods

Now that we’ve explored some of the more functional aspects of method refactoring, let’s take a look at some of the features that helped revolutionize .NET: static methods and extension methods.

Making methods static

Sometimes, your classes will have methods that don’t work directly with instance members (fields, properties, or non-static methods) of that class. For example, FlightTracker has a Format method that converts a DateTime to a string resembling “Wed Jul 12 23:14 PM”:

private string Format(DateTime time) {
    return time.ToString("ddd MMM dd HH:mm tt");
}

Here, Format doesn’t rely on anything other than the parameters it is provided to calculate a result. Because of this, we can make Format a static method.

Static methods are methods associated with the class itself and not with an instance of the class. As a result, you don’t need...

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