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C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development

C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development - Third Edition

By : Mark J. Price
3.7 (37)
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C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development

C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development

3.7 (37)
By: Mark J. Price

Overview of this book

C# 7.1 and .NET Core 2.0 – Modern Cross-Platform Development, Third Edition, is a practical guide to creating powerful cross-platform applications with C# 7.1 and .NET Core 2.0. It gives readers of any experience level a solid foundation in C# and .NET. The first part of the book runs you through the basics of C#, as well as debugging functions and object-oriented programming, before taking a quick tour through the latest features of C# 7.1 such as default literals, tuples, inferred tuple names, pattern matching, out variables, and more. After quickly taking you through C# and how .NET works, this book dives into the .NET Standard 2.0 class libraries, covering topics such as packaging and deploying your own libraries, and using common libraries for working with collections, performance, monitoring, serialization, files, databases, and encryption. The final section of the book demonstrates the major types of application that you can build and deploy cross-device and cross-platform. In this section, you'll learn about websites, web applications, web services, Universal Windows Platform (UWP) apps, and mobile apps. By the end of the book, you'll be armed with all the knowledge you need to build modern, cross-platform applications using C# and .NET.
Table of Contents (23 chapters)
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22
Index

Working with records

Before we dive into the new records language feature of C# 9, let us see some other related new features.

Init-only properties

You have used object initialization syntax to instantiate objects and set initial properties throughout this chapter. Those properties can also be changed after instantiation.

Sometimes you want to treat properties like readonly fields so they can be set during instantiation but not after. The new init keyword enables this. It can be used in place of the set keyword:

  1. In the PacktLibrary9 folder, add a new file named Records.cs.
  2. In the Records.cs file, define an immutable person class, as shown in the following code:
    namespace Packt.Shared
    {
      public class ImmutablePerson
      {
        public string FirstName { get; init; }
        public string LastName { get; init; }
      }
    }
    
  3. In Program.cs, at the bottom of the Main method, add statements to instantiate a new immutable person and then try to change...
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C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development
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