Book Image

Roslyn Cookbook

Book Image

Roslyn Cookbook

Overview of this book

Open-sourcing the C# and Visual Basic compilers is one of the most appreciated things by the .NET community, especially as it exposes rich code analysis APIs to analyze and edit code. If you want to use Roslyn API to write powerful extensions and contribute to the C# developer tool chain, then this book is for you. Additionally, if you are just a .NET developer and want to use this rich Roslyn-based functionality in Visual Studio to improve the code quality and maintenance of your code base, then this book is also for you. This book is divided into the following broad modules: 1. Writing and consuming analyzers/fixers (Chapters 1 - 5): You will learn to write different categories of Roslyn analyzers and harness and configure analyzers in your C# projects to catch quality, security and performance issues. Moving ahead, you will learn how to improve code maintenance and readability by using code fixes and refactorings and also learn how to write them. 2. Using Roslyn-based agile development features (Chapters 6 and 7): You will learn how to improve developer productivity in Visual Studio by using features such as live unit testing, C# interactive and scripting. 3. Contributing to the C# language and compiler tool chain (Chapters 8 - 10): You will see the power of open-sourcing the Roslyn compiler via the simple steps this book provides; thus, you will contribute a completely new C# language feature and implement it in the Roslyn compiler codebase. Finally, you will write simple command line tools based on the Roslyn service API to analyze and edit C# code.
Table of Contents (19 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Dedication

Writing an application based on the Workspaces API to format and simplify all source files in the solution


In this section, we will write a C# console application based on Roslyn Workspaces APIs to load a C# solution into a workspace and then perform the following operations:

  1. Format the solution to change tabs to white spaces with a custom indentation size. This is a syntactic code refactoring.
  2. Simplify the solution to change local declarations to have an explicit type specification instead of var. This is a semantic code refactoring.

Note

You can read the XML documentation comments and implementation details for the Formatter and Simplifier for additional information on these operations at: http://source.roslyn.io/#Microsoft.CodeAnalysis.Workspaces/Formatting/Formatter.cs,f445ffe3c814c002 and http://source.roslyn.io/#Microsoft.CodeAnalysis.Workspaces/Simplification/Simplifier.cs,1d256ae3815b1cac, respectively.

Getting started

You will need to have the Visual Studio 2017 Community Edition installed...