Book Image

C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development - Third Edition

By : Mark J. Price
Book Image

C# 7.1 and .NET Core 2.0 ??? Modern Cross-Platform Development - Third Edition

By: Mark J. Price

Overview of this book

C# 7.1 and .NET Core 2.0 – Modern Cross-Platform Development, Third Edition, is a practical guide to creating powerful cross-platform applications with C# 7.1 and .NET Core 2.0. It gives readers of any experience level a solid foundation in C# and .NET. The first part of the book runs you through the basics of C#, as well as debugging functions and object-oriented programming, before taking a quick tour through the latest features of C# 7.1 such as default literals, tuples, inferred tuple names, pattern matching, out variables, and more. After quickly taking you through C# and how .NET works, this book dives into the .NET Standard 2.0 class libraries, covering topics such as packaging and deploying your own libraries, and using common libraries for working with collections, performance, monitoring, serialization, files, databases, and encryption. The final section of the book demonstrates the major types of application that you can build and deploy cross-device and cross-platform. In this section, you'll learn about websites, web applications, web services, Universal Windows Platform (UWP) apps, and mobile apps. By the end of the book, you'll be armed with all the knowledge you need to build modern, cross-platform applications using C# and .NET.
Table of Contents (31 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
2
Part 1 – C# 7.1
8
Part 2 – .NET Core 2.0 and .NET Standard 2.0
16
Part 3 – App Models
22
Summary
Index

Working with text


One of the other most common types of data for variables is text. The most common types in .NET Standard 2.0 for working with text are shown in the following table:

Namespace

Example types

Description

System

Char

Storage for a single text character

System

String

Storage for multiple text characters

System.Text

StringBuilder

Efficiently manipulates strings

System.Text .RegularExpressions

Regex

Efficiently pattern-matches strings

Getting the length of a string

Add a new console application project named WorkingWithText.

In Visual Studio 2017, set the solution's startup project to be the current selection.

Sometimes, you need to find out the length of a piece of text stored in a string class.

In Main, add statements to define a variable to store the name of the city London, and then output its name and length, as shown in the following code:

string city = "London"; 
WriteLine($"{city} is {city.Length} characters long.");

Getting the characters of a string

A string class uses an array of char internally...