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)

Building web services using the ASP.NET Core Web API

Before we build a modern web service, we need to cover some background to set the context for this chapter.

Understanding web service acronyms

Although HTTP was originally designed to request and respond with HTML and other resources for humans to look at, it is also good for building services.

Roy Fielding stated in his doctoral dissertation, describing the Representational State Transfer (REST) architectural style, that the HTTP standard would be great for building services because it defines the following:

  • URIs to uniquely identify resources, like https://localhost:5001/api/products/23.
  • Methods to perform common tasks on those resources, like GET, POST, PUT, and DELETE.
  • The ability to negotiate the media type of content exchanged in requests and responses, such as XML and JSON. Content negotiation happens when the client specifies a request header like Accept: application/xml,*/*;q...