Kick off your book project in 2 hours, get started with GhostAI in 2 hours, or do both! Free live workshops, on Zoom. You’ll leave with a real book project and a clear plan to keep going. Saturday, June 27, 2026.

Leanpub Header

Skip to main content

Software That Lasts

Professional C# Development with Clean Architecture, DDD, and Concurrency

This book is written for you who want to build professional C# software — not just code

that compiles, but code that can be maintained, tested, scaled, and explained to others.

This book is a translation into English of Software der holder which was originally written in Danish

Minimum price

$20.00

$30.00

You pay

Author earns

$

Also available for 1 book credit with a Reader Membership

PDF
About

About

About the Book

Professional C# Development with Clean Architecture, DDD, and Concurrency

This book is a translation into English of Software der holder which was originally written in Danish

Author

About the Author

Translations

Translations

Languages

Contents

Table of Contents

  • Front matter
    • Preface
    • MyClinic — the book's reference domain
  • Part 1 — Foundations of code quality
    • 1 Encapsulation, Cohesion, and Coupling
    • 2 SRP, OCP, LSP, and ISP
    • 3 Dependency Inversion Principle and the IoC Container
    • 4 Pre- and Post-conditions and Guard Clauses
    • 5 Unit Testing with xUnit and Moq
  • Part 2 — Domain-Driven Design
    • 6 Why DDD — the Domain at the Center
    • 7 Entity, Value Object, and Aggregate Root
    • 8 Domain Rules in Code — Invariants, Factory, and Guard
  • Part 3 — Clean Architecture
    • 9 Layering and the Dependency Rule
    • 10 The Use Case Layer and CQS
    • 11 Composition Root and Contracts
    • 12 Infrastructure with EF Core 10
    • 13 LINQ and Deferred Execution
  • Part 4 — User Interface with Blazor Interactive Server
    • 14 Semantic HTML5 and CSS
    • 15 Blazor Interactive Server
    • 16 Forms, Validation, and EditForm
    • 17 CRUD through the Contract
    • 18 The Strategy Pattern in Practice
  • Part 5 — Concurrency and Parallelism
    • 19 Threads and Concurrency Problems
    • 20 Synchronization Mechanisms
    • 21 Async and Await for I/O-bound Work
    • 22 Tasks and Parallel for CPU-bound Work
    • 23 Parallel Strategy Discount — Integration in MyClinic
  • Part 6 — The Whole Picture
    • 24 Big O and Algorithmic Analysis
    • 25 The Whole Picture — From Requirements to Running System
  • Appendices
    • A AI as a Learning Tool
    • B Exercise Solutions
    • C Learning Debt
    • D Constructive Alignment and the SOLO Taxonomy
    • E Instructor Notes

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

See full terms...

Earn $8 on a $10 Purchase, and $16 on a $20 Purchase

We pay 80% royalties on purchases of $7.99 or more, and 80% royalties minus a 50 cent flat fee on purchases between $0.99 and $7.98. You earn $8 on a $10 sale, and $16 on a $20 sale. So, if we sell 5000 non-refunded copies of your book for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

In fact, authors have earned over $15 million writing, publishing and selling on Leanpub.

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub