Book Image

Learn C# Programming

By : Marius Bancila, Raffaele Rialdi, Ankit Sharma
5 (1)
Book Image

Learn C# Programming

5 (1)
By: Marius Bancila, Raffaele Rialdi, Ankit Sharma

Overview of this book

The C# programming language is often developers’ primary choice for creating a wide range of applications for desktop, cloud, and mobile. In nearly two decades of its existence, C# has evolved from a general-purpose, object-oriented language to a multi-paradigm language with impressive features. This book will take you through C# from the ground up in a step-by-step manner. You'll start with the building blocks of C#, which include basic data types, variables, strings, arrays, operators, control statements, and loops. Once comfortable with the basics, you'll then progress to learning object-oriented programming concepts such as classes and structures, objects, interfaces, and abstraction. Generics, functional programming, dynamic, and asynchronous programming are covered in detail. This book also takes you through regular expressions, reflection, memory management, pattern matching, exceptions, and many other advanced topics. As you advance, you'll explore the .NET Core 3 framework and learn how to use the dotnet command-line interface (CLI), consume NuGet packages, develop for Linux, and migrate apps built with .NET Framework. Finally, you'll understand how to run unit tests with the Microsoft unit testing frameworks available in Visual Studio. By the end of this book, you’ll be well-versed with the essentials of the C# language and be ready to start creating apps with it.
Table of Contents (20 chapters)

Chapter 15: New Features of C# 8

C# is a mature programming language, but it is still evolving to satisfy new requirements coming from emergent software architectures. The main focus of most of the four language versions of C# 7 is on providing the tools for impressive performance when using value types.

With the latest version, C# 8 introduces many new important features focusing on four main areas: making code more compact and easier to read, along with performance, robustness, and expressivity. The fundamental change in C# 8 is that it is the first release of the language without official support in .NET Framework because some of its features require the .NET Core runtime enhancements.

In this chapter, we will go through the following new language features:

  • Nullable reference types
  • Default implementation of interface members
  • Ranges and indices
  • Pattern matching
  • The using declaration
  • Asynchronous Dispose
  • Disposable patterns in structs and ref...