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)

Working with images

ImageSharp is a third-party cross-platform 2D graphics library. When .NET Core 1.0 was in development, there was negative feedback about the missing System.Drawing namespace for working with 2D images. The ImageSharp project was started to fill that gap for modern .NET applications.

In their official documentation for System.Drawing, Microsoft says, "The System.Drawing namespace is not recommended for new development, due to not being supported within a Windows or ASP.NET service and it is not cross-platform. ImageSharp and SkiaSharp are recommended as alternatives."

Let us see what can be achieved with ImageSharp:

  1. Create a new console application project named WorkingWithImages, add it to the workspace, and select it as the active project for OmniSharp.
  2. Create an images folder and download the nine images from the following link:
  3. Open WorkingWithImages...