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)

Anonymous types

It is sometimes necessary to construct temporary objects that hold some values, usually a subset of some larger object. To avoid creating a specific type for this purpose only, the language provides so-called anonymous types. These are a sort of use-and-forget types typically used in query expressions with Language Integrated Query (LINQ). This topic will be discussed in Chapter 10, Lambdas, LINQ, and Functional Programming.

These types are called anonymous because you do not specify a name in the source code. The name is assigned by the compiler. They consist of read-only properties only; any other member type is not allowed. The type of the read-only properties cannot be explicitly specified and is inferred by the compiler.

An anonymous type is introduced with the new keyword followed by a list of properties in angle-brackets (an object initializer). The following code snippet shows an example:

var o = new { Name = "M270 Turbo", Capacity = 1600...