Book Image

C# 12 and .NET 8 – Modern Cross-Platform Development Fundamentals - Eighth Edition

By : Mark J. Price
4.6 (14)
Book Image

C# 12 and .NET 8 – Modern Cross-Platform Development Fundamentals - Eighth Edition

4.6 (14)
By: Mark J. Price

Overview of this book

This latest edition of the bestselling Packt series will give you a solid foundation to start building projects using modern C# and .NET with confidence. You'll learn about object-oriented programming; writing, testing, and debugging functions; and implementing interfaces. You'll take on .NET APIs for managing and querying data, working with the fi lesystem, and serialization. As you progress, you'll explore examples of cross-platform projects you can build and deploy, such as websites and services using ASP.NET Core. This latest edition integrates .NET 8 enhancements into its examples: type aliasing and primary constructors for concise and expressive code. You'll handle errors robustly through the new built-in guard clauses and explore a simplified implementation of caching in ASP.NET Core 8. If that's not enough, you'll also see how native ahead-of-time (AOT) compiler publish lets web services reduce memory use and run faster. You'll work with the seamless new HTTP editor in Visual Studio 2022 to enhance the testing and debugging process. You'll even get introduced to Blazor Full Stack with its new unified hosting model for unparalleled web development flexibility.
Table of Contents (18 chapters)
17
Index

Pattern matching with objects

In Chapter 3, Controlling Flow, Converting Types, and Handling Exceptions, you were introduced to basic pattern matching. In this section, we will explore pattern matching in more detail.

Pattern-matching flight passengers

In this example, we will define some classes that represent various types of passengers on a flight, and then we will use a switch expression with pattern matching to determine the cost of their flight:

  1. In the PacktLibraryNetStandard2 project/folder, add a new file named FlightPatterns.cs.
  2. If you use Visual Studio 2022, in FlightPatterns.cs, delete the existing statements, including the class named FlightPatterns, because we will define multiple classes, and none match the name of the code file.
  3. In FlightPatterns.cs, add statements to define three types of passenger with different properties, as shown in the following code:
    // All the classes in this file will be defined in the following namespace...