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)

Regular expressions

Another form of pattern matching is represented by regular expressions. A regular expression is a pattern that can be matched against a text. Although not supported directly at the language level, regular expressions are made available to .NET developers through the Regex class from the System.Text.RegularExpressions namespace. In the following pages, we will look at how you can use this class to match an input text, find parts of it, or replace portions of the text.

Regular expressions are composed of constants (that represent sets of strings) and operator symbols (that represent operations on these sets). The actual language for building regular expressions is more complex than what can be described in the scope of this chapter. If you are not familiar with regular expressions, we recommend using additional resources for learning them. You can also build and test your regular expressions using online tools such as https://regex101.com/ or https://regexr.com...