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)

The task paradigm

Concurrency is primarily about designing algorithms with very loosely coupled units of work, which is often not possible or extends the complexity beyond any possible benefit.

Asynchronous programming is, instead, related to the asynchronous nature of the OS and the devices, whether because they fire events or because it takes time to fulfill the requested operation. Every time the user moves the mouse, types keys on the keyboard, or retrieves some data from the internet, the OS presents data to our process in a separate thread and our code must be ready to consume it.

One of the simplest possible examples is loading a text file from disk and computing the string length, which can be different from the file length, depending on the encoding:

public int ReadLength(string filename)
    string content = File.ReadAllText(filename);
    return content.Length;

As soon as you invoke this method, the calling thread gets...