Christian Nagel - Professional C# and .NET

1. Chapter 1
2. Chapter 5
3. Chapter 6
4. Chapter 8
5. Chapter 9
6. Chapter 13
7. Chapter 14
8. Chapter 16
9. Chapter 17
10. Chapter 18
11. Chapter 19
12. Chapter 20
13. Chapter 22
14. Chapter 23
15. Chapter 24
16. Chapter 25
17. Chapter 26
18. Chapter 27
19. Chapter 28
20. Chapter 29
21. Chapter 30
22. Chapter 31

2021 Edition

Christian Nagel

Copyright 2022 by John Wiley & Sons, Inc. All rights reserved.

Published by John Wiley & Sons, Inc., Hoboken, New Jersey.

Published simultaneously in Canada.

ISBN: 978-1-119-79720-3
ISBN: 978-1-119-79722-7 (ebk)
ISBN: 978-1-119-79721-0 (ebk)

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Cover image: Henrik5000/Getty Images
Cover design: Wiley

This book is dedicated to my familyAngela,
Stephanie, Matthias, and KatharinaI love you all!

CHRISTIAN NAGEL is a Microsoft MVP for Visual Studio and Development Technologies and has been Microsoft Regional Director for more than 15 years. Christian is the founder of CN innovation, where he offers coaching, training, code reviews, and assistance with architecting and developing solutions using Microsoft technologies. He draws on more than 25 years of software development experience.

Christian started his computing career with PDP 11 and VAX/VMS systems at Digital Equipment Corporation, covering a variety of languages and platforms. Since 2000, when .NET was just a technology preview, he has been working with various technologies to build .NET solutions. Currently, he mainly coaches people on developing and architecting solutions based on .NET and Microsoft Azure technologies, including Windows apps, ASP.NET Core, and .NET MAUI. A big part of his job is helping companies move their solutions to Microsoft Azure.

Even after many years in software development, Christian still loves learning and using new technologies and teaching others how to use them. Using his profound knowledge of Microsoft technologies, he has written numerous books and is certified as a Microsoft Certified Trainer, Azure Developer Associate, DevOps Engineer Expert, and Certified Solution Developer. Christian speaks at international conferences such as Microsoft Ignite (previously named TechEd), BASTA!, and TechDays. You can contact Christian via his website at www.cninnovation.com, read his blog at csharp.christiannagel.com, and follow his tweets at @christiannagel.

ROD STEPHENS is a long-time developer and author who has written more than 250 magazine articles and 35 books that have been translated into languages around the world. During his career, Rod has worked on an eclectic assortment of applications in such fields as telephone switching, billing, repair dispatching, tax processing, wastewater treatment, concert ticket sales, cartography, and training for professional football teams.

Rod's popular C# Helper website (www.csharphelper.com) receives millions of hits per year and contains tips, tricks, and example programs for C# programmers. His VB Helper website (www.vb-helper.com) contains similar material for Visual Basic programmers.

You can contact Rod at .

I WANT TO THANK Charlotte Kughen. For many years and many editions of this book, she has made my text so much more readable. Often, I completed chapters late in the evening, when I miss things as I turn sentences around. Charlotte was of enormous help in changing my ideas into great readable text. Charlotte, big thanks for your continued support with these editions; I'm looking forward to working together in the future as well.

Special thanks also go to Rod Stephens, the technical editor of this edition. Rod had great comments on my source code and induced some changes that helped with the quality of the source code. Rod is also the author of some great books, for example Essential Algorithms: A Practical Approach to Computer Algorithms Using Python and C# and WPF 3d: Three-Dimensional Graphics with WPF and C#. These books can be a great addition for your C# bookshelf.

My thanks also go to the complete team working on the book. In particular, I want to thank Istvn Novak, technical editor of several previous editions of this book. Now Istvn had the role as technical proofreader to solve some final issues. I also want to thank Kim Wimpsett, who fixed some more text issues during the production phase, and Barath Kumar Rajasekaran, who helped the flow during production.