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)

Understanding generics

Simply put, generics are types parametrized with other types. As we mentioned before, we can create a class, structure, interface, method, or delegate that accepts one or more data types they use as parameters. These parameters are known as type parameters and act as placeholders for the actual data types that are passed during compile time.

For example, we can create a class that models a list, which is a variable-length sequence of elements of the same type. Instead of having a different class that works with integers, doubles, strings, or any other user-defined types we might need, we can create a generic class that has a type parameter specifying the actual type of its elements. We will then specify the actual type at compile time when we instantiate the class.

Advantages of using generics include the following:

  • Generics provide reusability: We can create a single version of the code and reuse it for different data types.
  • Generics promote...