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)

Garbage collection

The Common Language Runtime (CLR) is responsible for managing the lifetime of objects and freeing memory when it's no longer used so that new objects can be allocated within the process. It does so through a component called the garbage collector (GC), which allocates objects on the managed heap in an efficient manner and clears memory by reclaiming objects that are no longer used. The garbage collector makes developing applications easier because you do not have to worry about manually freeing memory. This is what makes applications written for .NET to be known as managed.

Before we discuss how all this happens, you need to understand the difference between stack and heap, as well as the differences between types, objects, and references.

A type (whether introduced with the class or struct keyword in C#) is a blueprint for constructing objects. It is described in the source code using language features. An object is an instantiation of a type and lives...