target="_blank" rel="nofollow" href="#i000002370000.png"/>As you work through the examples in this book, you may choose either to type in all the code manually or to use the source code files that accompany the book. All the source code used in this book is available for download at www.wrox.com/go/professionalcsharp6. When at the site, simply locate the book’s title (either by using the Search box or by using one of the title lists) and click the Download Code link on the book’s detail page to obtain all the source code for the book.
NOTE Because many books have similar titles, you may find it easiest to search by ISBN; this book’s ISBN is 978-1-119-09660-3.
After you download the code, just decompress it with your favorite compression tool. Alternatively, you can go to the main Wrox code download page at http://www.wrox.com/dynamic/books/download.aspx to see the code available for this book and all other Wrox books.
With the fast pace of updates with .NET Core, the source code of the book is also available at http://www .github.com/ProfessionalCSharp. Be aware that the source code on GitHub offers living source files that will be updated with minor update versions of Visual Studio, as well as new experimental C# features. For updates to the source code and additional samples done after the release of the book, check the GitHub site. The stable version of the source code that corresponds to the content of the printed book is available from the Wrox site.
We make every effort to ensure that there are no errors in the text or in the code. However, no one is perfect, and mistakes do occur. If you find an error in one of our books, like a spelling mistake or faulty piece of code, we would be grateful for your feedback. By sending in errata you may save another reader hours of frustration, and at the same time you can help provide even higher-quality information.
To find the errata page for this book, go to http://www.wrox.com and locate the title using the Search box or one of the title lists. Then, on the book details page, click the Book Errata link. On this page you can view all errata that have been submitted for this book and posted by Wrox editors. A complete book list including links to each book’s errata is also available at www.wrox.com/misc-pages/booklist.shtml.
If you don’t spot “your” error on the Book Errata page, go to www.wrox.com/contact/techsupport.shtml and complete the form there to send us the error you have found. We’ll check the information and, if appropriate, post a message to the book’s errata page and fix the problem in subsequent editions of the book.
For author and peer discussion, join the P2P forums at p2p.wrox.com. The forums are a web-based system for you to post messages relating to Wrox books and related technologies and interact with other readers and technology users. The forums offer a subscription feature to e-mail you topics of interest of your choosing when new posts are made to the forums. Wrox authors, editors, other industry experts, and your fellow readers are present on these forums.
At http://p2p.wrox.com you can find a number of different forums to help you not only as you read this book, but also as you develop your own applications. To join the forums, just follow these steps:
1. Go to p2p.wrox.com and click the Register link.
2. Read the terms of use and click Agree.
3. Complete the required information to join and any optional information you want to provide, and click Submit.
4. You will receive an e-mail with information describing how to verify your account and complete the joining process.
NOTE You can read messages in the forums without joining P2P but to post your own messages, you must join.
After you join, you can post new messages and respond to messages other users post. You can read messages at any time on the web. If you want to have new messages from a particular forum e-mailed to you, click the Subscribe to this Forum icon by the forum name in the forum listing.
For more information about how to use the Wrox P2P, read the P2P FAQs for answers to questions about how the forum software works as well as many common questions specific to P2P and Wrox books. To read the FAQs, click the FAQ link on any P2P page.
PART I
The C# Language
1
.NET Application Architectures
What’s In This Chapter?
• Reviewing the history of .NET
• Understanding differences between .NET Framework 4.6 and .NET Core 1.0
• Assemblies and NuGet Packages
• The Common Language Runtime
• Features of the Windows Runtime
• Programming Hello, World!
• Universal Windows Platform
• Technologies for creating Windows Apps
• Technologies for creating Web Apps
Wrox.com Code Downloads for This Chapter
The wrox.com code downloads for this chapter are found at www.wrox.com/go/professionalcsharp6 on the Download Code tab. The code for this chapter is divided into the following major examples:
• DotnetHelloWorld
• HelloWorldApp (.NET Core)
In recent years,NET has become a huge ecosystem for creating any kind of applications on the Windows platform. With .NET you can create Windows apps, web services, web applications, and apps for the Microsoft Phone.
The newest release of .NET is a big change from the last version – maybe the biggest change to .NET since its invention. Much of the .NET code has become open-source code, and you can create applications for other platforms as well. The new version of .NET (.NET Core) and NuGet packages allow Microsoft to provide faster update cycles for delivering new features. It’s not easy to decide what technology should be used for creating applications. This chapter helps you with that. It gives you information about the different technologies available for creating Windows and web applications and services, offers guidance on what to choose for database access, and highlights the differences between .NET and .NET Core.
To better understand what is available with .NET and C#, it is best to know something about its history. The following table shows the version of .NET in relation to the Common Language Runtime (CLR), the version of C#, and the Visual Studio edition that gives some idea about the year when the corresponding versions have been released. Besides knowing what technology to use, it’s also good
