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 Stack<T> collection

A stack is a linear data structure that allows us to insert and delete items in a particular order. New items are added at the top of the stack. If we want to remove an item from the stack, we can only remove the top item. Since insertion and deletion is allowed from only one end, the item to be inserted last will be the item to be deleted first. Therefore, the stack is called a Last in, First Out (LIFO) collection.

The following diagram depicts a stack, where push represents adding an item to the stack and pop represents deleting an item from the stack:

Figure 7.4 – The conceptual representation of a stack.

.NET provides the generic Stack<T> class for working with stacks. This class contains several constructors that allow us to create either an empty stack or a stack initialized with a collection of elements. Take a look at the following code snippet, where we are creating a stack of strings with three initial elements and an...