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)

Debugging during development

In this section, you will learn how to debug problems at development time.

More Information: It can be tricky setting up the OmniSharp debugger for Visual Studio Code. If you have trouble, try reading the information at the following link:

Creating code with a deliberate bug

Let's explore debugging by creating a console app with a deliberate bug that we will then use the OmniSharp debugger tools to track down and fix:

  1. In Chapter04, create a folder named Debugging, add it to the workspace, and create a console application in the folder.
  2. Navigate to View | Command Palette, enter and select OmniSharp: Select Project, and then select the Debugging project.
  3. When you see the pop-up warning message saying that required assets are missing, click Yes to add them.
  4. In the Debugging folder, open and modify Program.cs to define a function...