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 List<T> collection

The List<T> generic class represents a collection of elements that can be accessed by their index. List<T> is very similar to arrays, except that the size of the collection is not fixed but variable, and it can grow or decrease as elements are added or removed. In fact, the implementation of List<T> uses an array to store the elements. When the number of elements exceeds the size of the array, a new and larger array is allocated, and the content of the previous array is copied to the new one. This means that List<T> stores the elements in contiguous memory locations. However, for value types, these locations contain the values, but for reference types, they contain references to the actual objects. Multiple references to the same object can be added to a list.

The List<T> class implements a series of generic and non-generic interfaces, as shown in the following declaration of the class:

public class List<T> : ICollection...