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

Inheriting from classes

The Person type we created earlier derived (inherited) from System.Object. Now, we will create a subclass that inherits from Person:

  1. In the PacktLibrary project, add a new class file named Employee.cs.
  2. Modify its contents to define a class named Employee that derives from Person, as shown in the following code:
    namespace Packt.Shared;
    public class Employee : Person
    {
    }
    
  3. In the PeopleApp project, in Program.cs, add statements to create an instance of the Employee class, as shown in the following code:
    Employee john = new()
    {
      Name = "John Jones",
      Born = new(year: 1990, month: 7, day: 28,
        hour: 0, minute: 0, second: 0, offset: TimeSpan.Zero))
    };
    john.WriteToConsole();
    
  4. Run the PeopleApp project and view the result, as shown in the following output:
    John Jones was born on a Saturday.
    

Note that the Employee class has inherited all the members of Person.

Extending...