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)


An enumeration is a set of named integral constants. We use the enum keyword to declare an enumeration. An enumeration is a value type. Enumerations are useful when we want to use a limited number of integral values for some particular purpose. Defining and using an enumeration has several advantages:

  • We use named constants instead of literal values. This makes the code more readable and easier to maintain.
  • When you use IDEs, such as Visual Studio, you can see the list of possible values that can be assigned to a variable.
  • It enforces type safety for using numerical constants.

The following example shows an enumeration called Priority with four possible values:

enum Priority

Each element of an enumeration stands for an integer value. By default, the first identifier is assigned to zero (0). The value of each successive...