You're reading from Learn C# Programming A guide to building a solid foundation in C# language for writing efficient programs

Product type Paperback

Published in Apr 2020

Publisher Packt

ISBN-13 9781789805864

Length 636 pages

Edition 1st Edition

Languages

Tools

.NET

Concepts

Programming Language

Authors (4):

Raffaele Rialdi

Ankit Sharma

Prakash Tripathi

Marius Bancila

View More author details

Table of Contents (20) Chapters

Preface

1. Chapter 1: Starting with the Building Blocks of C#

2. Chapter 2: Data Types and Operators FREE CHAPTER

3. Chapter 3: Control Statements and Exceptions

4. Chapter 4: Understanding the Various User-Defined Types

5. Chapter 5: Object-Oriented Programming in C#

6. Chapter 6: Generics

7. Chapter 7: Collections

8. Chapter 8: Advanced Topics

9. Chapter 9: Resource Management

10. Chapter 10: Lambdas, LINQ, and Functional Programming

11. Chapter 11: Reflection and Dynamic Programming

12. Chapter 12: Multithreading and Asynchronous Programming

13. Chapter 13: Files, Streams, and Serialization

14. Chapter 14: Error Handling

15. Chapter 15: New Features of C# 8

16. Chapter 16: C# in Action with .NET Core 3

17. Chapter 17: Unit Testing

18. Assessments

19. Other Books You May Enjoy

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Pattern matching

Pattern matching is the process of checking whether a value has a particular shape as well as extracting information out of the value when the matching is successful. To some extent, that is what we regularly do with the if and switch statements when we check whether an object has some value and then proceed to extract information from it. However, this is a rudimentary form of pattern matching.

In C# 7, new capabilities are added to is and switch statements to enable pattern matching capabilities that drive a better separation of data and code and lead to more concise and readable code. The pattern matching capabilities are extended with new features in C# 8. You will learn about these in Chapter 15, New Features of C# 8.

The is expression

At runtime, the is operator checks that an object is compatible with a given type (the general form, expr is type). However, in C# 7, this was extended to include several forms of pattern matching: