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About the Technology
C# and the .NET framework are prized for their power, flexibility, and ease of scaling. Line-of-business applications, web systems running ASP.NET, and backend servers powering enterprise data centers all rely on C#. Growing into a C# pro requires practice in real-world systems, where you learn to refactor messy code and integrate new features into existing designs. Code Like a Pro in C# lays out a path to C# mastery, tackling common challenges such as clean coding, idiomatic C#, and .NET Core that can stump aspiring C# software engineers.About the book
Code like a Pro in C# builds on your existing programming skills to help you seamlessly upskill your coding practice or transition to C# from Java or another OO language. You’ll learn to write the kind of idiomatic C# code that’s essential for enterprise development, honing your mastery with guided coding katas. This book discusses essential backend skills and puts them into practice with a common career challenge: refactoring a legacy codebase to be secure, clean, and readable. By the time you’re done, you’ll have a professional-level understanding of C# and be ready to start specializing with advanced-level resources.
Table of Contents takes you straight to the bookdetailed table of contents
Part 1: Introduction
1 This is C#
1.1 Why work in C#?
1.1.1 Reason 1: C# is scalable and economical
1.1.2 Reason 2: C# can improve stability
1.1.3 Reason 3: C# is developer-friendly and easy to use
1.1.4 Reason 4: C# goes hand-in-hand with cloud and CI/CD
1.2 Why not work in C#?
1.2.1 Operating system development in C#
1.2.2 Real-Time Operating System embedded development in C#
1.2.3 Numerical computing and C#
1.3 Switching to C#
1.4 The importance of “Clean Code”
1.5 What you will learn in this book
1.6 What you will not learn in this book
1.7 How this book is structured
1.8 Summary
2 Tour de C# and .NET
2.1 The .NET Framework compared to other platforms
2.1.1 The .NET Framework compared to other platforms: tuples
2.1.2 The .NET Framework compared to other platforms: events
2.1.3 The .NET Framework compared to other platforms: SQL
2.1.4 The .NET Framework compared to other platforms: CSV parser
2.1.5 Exercises
2.2 What is .NET Core?
2.2.1 Exercises
2.3 What is .NET Framework 5?
2.4 How C# is compiled
2.4.1 Step 1: C# code (high-level)
2.4.2 Step 2: Common Intermediate Language (assembly level)
2.4.3 Step 3: Bytecode (Processor Level)
2.4.4 Exercises
2.5 Summary
Part 2: Inheriting Code
3 Inheriting code: requirements, models, and views
3.1 Introducing “Flying Dutchman Airlines”
3.2 Pieces of the puzzle
3.2.1 The GET /flight endpoint: retrieving information on all flights
3.2.2 GET /flight/{flightNumber}
3.2.3 The POST /booking/{flightNumber} endpoint: Booking a flight
3.2.4 Exercises
3.3 The existing code
3.3.1 The database schema and its tables
3.3.2 The existing codebase: web service configurations files
3.3.3 Models and views
3.4 Summary
4 Inheriting code: controllers
4.1 The FlightController: GET /flight endpoint
4.1.1 The GET /flight endpoint and what it does
4.1.2 Method Signature: the ResponseType and Typeof story
4.1.3 Collecting flight information with collections
4.1.4 Connection strings; or how to give a security engineer a heart-attack
4.1.5 Garbage collection through using statements and IDisposable
4.2 The FlightController: GET /flight/{flightNumber}
4.3 The FlightController: POST /flight
4.4 The FlightController: DELETE /flight/{flightNumber}
4.5 Exercises
4.6 Summary
Part 3: The Refactor
5 The refactor: setup and the database access layer
5.1 Creating a .NET Core solution and project
5.2 Setting up and configuring a web service
5.2.1 Configuring a .NET Core web service
5.2.2 Using The Builder pattern in C#
5.2.3 Creating and using WebHostBuilder
5.2.4 Implementing te Startup class
5.2.5 Using the Repository Pattern for our web service architecture
5.3 Implementing the database access layer
5.3.1 Entity Framework Core and “Reverse-Engineering”
5.3.2 DbSet and the Entity Framework Core workflow
5.3.3 Configuration Methods and environment variables
5.3.4 Setting an environment variable on Windows
5.3.5 Setting an environment variable on OSX
5.3.6 Retrieving environment variables at runtime in your code
5.4 Exercises
5.5 Summary
6 The refactor: the repository layer (Customer)
6.1 Test-Driven Development
6.1.1 Exercises
6.2 The CreateCustomer method
6.2.1 Why you should always validate input arguments
6.2.2 Using Arrange, Act, Assert to write unit tests
6.2.3 Validating against invalid characters and LINQ
6.2.4 In-lining test data with the [DataRow] attribute
6.2.5 Object initializers and auto-generated code
6.2.6 Constructors, reflection, and asynchronous programming
6.2.7 Locks, mutexes, and semaphores
6.2.8 Synchronous to asynchronous execution… continued
6.2.9 Dependency Injection and testing Entity Framework Core
6.2.10 Exercises
6.3 Summary
7 The refactor: the repository layer (Customer) continued
7.1 The GetCustomerByName method
7.1.1 Question marks: nullable types and their applications
7.1.2 Custom exceptions, LINQ, and Extension methods
7.2 Congruence: from the middle ages to C#
7.2.1 Creating a “Comparer” class
7.2.2 Overloading the equality operator
7.3 Exercises
7.4 Summary
8 The refactor: the repository layer (Booking)
9 The refactor: the repository layer (Airport and Flight)
10 The refactor: the service layer(Customer and Booking)
11 The refactor: the service layer (Booking) continued
12 The refactor: the service layer (Airport and Flight)
13 The refactor: controllers
14 The refactor: integration testing
15 Coding katas #1
16 Coding katas #2
Appendixes
Appendix A: Exercise Answers
Appendix B: Clean Code checklists
Appendix C: Installation Guides
Appendix D: OpenAPI FlyTomorrow
Appendix E: Reading List
What's inside
- Test-driven development
- Refactoring an API to a multi-platform .NET Core service
- Principles of clean code
- Using Entity Framework Core and LINQ to query and manipulate databases
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