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

LINQ in practice

Now we can build a console app to explore practical examples of using LINQ.

Understanding deferred execution

LINQ uses deferred execution. It is important to understand that calling most of the above extension methods does not execute the query and get the results. Most of these extension methods return a LINQ expression that represents a question, not an answer. Let's explore:

  1. Use your preferred code editor to create a new project, as defined in the following list:
    • Project template: Console App / console
    • Project file and folder: LinqWithObjects
    • Solution file and folder: Chapter11
  2. In the project file, globally and statically import the System.Console class.
  3. Add a new class file named Program.Helpers.cs.
  4. In Program.Helpers.cs, delete any existing statements and then define a partial Program class with a method to output a section title, as shown in the following code:
partial class Program
{
  private static void SectionTitle(string title)
  {
    ConsoleColor...