Book Image

C# 9 and .NET 5 – Modern Cross-Platform Development - Fifth Edition

By : Mark J. Price
Book Image

C# 9 and .NET 5 – Modern Cross-Platform Development - Fifth Edition

By: Mark J. Price

Overview of this book

In C# 9 and .NET 5 – Modern Cross-Platform Development, Fifth Edition, expert teacher Mark J. Price gives you everything you need to start programming C# applications. This latest edition uses the popular Visual Studio Code editor to work across all major operating systems. It is fully updated and expanded with a new chapter on the Microsoft Blazor framework. The book’s first part teaches the fundamentals of C#, including object-oriented programming and new C# 9 features such as top-level programs, target-typed new object instantiation, and immutable types using the record keyword. Part 2 covers the .NET APIs, for performing tasks like managing and querying data, monitoring and improving performance, and working with the file system, async streams, serialization, and encryption. Part 3 provides examples of cross-platform apps you can build and deploy, such as websites and services using ASP.NET Core or mobile apps using Xamarin.Forms. The best type of application for learning the C# language constructs and many of the .NET libraries is one that does not distract with unnecessary application code. For that reason, the C# and .NET topics covered in Chapters 1 to 13 feature console applications. In Chapters 14 to 20, having mastered the basics of the language and libraries, you will build practical applications using ASP.NET Core, Model-View-Controller (MVC), and Blazor. By the end of the book, you will have acquired the understanding and skills you need to use C# 9 and .NET 5 to create websites, services, and mobile apps.
Table of Contents (23 chapters)

Talking about object-oriented programming

An object in the real world is a thing, such as a car or a person, whereas an object in programming often represents something in the real world, such as a product or bank account, but this can also be something more abstract.

In C#, we use the class (mostly) or struct (sometimes) C# keywords to define a type of object. You will learn about the difference between classes and structs in Chapter 6, Implementing Interfaces and Inheriting Classes. You can think of a type as being a blueprint or template for an object.

The concepts of object-oriented programming are briefly described here:

  • Encapsulation is the combination of the data and actions that are related to an object. For example, a BankAccount type might have data, such as Balance and AccountName, as well as actions, such as Deposit and Withdraw. When encapsulating, you often want to control what can access those actions and the data, for example, restricting how...