Book Image

C# 8.0 and .NET Core 3.0 – Modern Cross-Platform Development - Fourth Edition

By : Mark J. Price
Book Image

C# 8.0 and .NET Core 3.0 – Modern Cross-Platform Development - Fourth Edition

By: Mark J. Price

Overview of this book

In C# 8.0 and .NET Core 3.0 – Modern Cross-Platform Development, Fourth Edition, expert teacher Mark J. Price gives you everything you need to start programming C# applications. This latest edition uses the popular Visual Studio Code editor to work across all major operating systems. It is fully updated and expanded with new chapters on Content Management Systems (CMS) and machine learning with ML.NET. The book covers all the topics you need. Part 1 teaches the fundamentals of C#, including object-oriented programming, and new C# 8.0 features such as nullable reference types, simplified switch pattern matching, and default interface methods. Part 2 covers the .NET Standard APIs, such as managing and querying data, monitoring and improving performance, working with the filesystem, async streams, serialization, and encryption. Part 3 provides examples of cross-platform applications you can build and deploy, such as web apps using ASP.NET Core or mobile apps using Xamarin.Forms. The book introduces three technologies for building Windows desktop applications including Windows Forms, Windows Presentation Foundation (WPF), and Universal Windows Platform (UWP) apps, as well as web applications, web services, and mobile apps.
Table of Contents (21 chapters)

Operating on variables

Operators apply simple operations such as addition and multiplication to operands such as variables and literal values. They usually return a new value that is the result of the operation that can be assigned to a variable.

Most operators are binary, meaning that they work on two operands, as shown in the following pseudocode:

var resultOfOperation = firstOperand operator secondOperand;

Some operators are unary, meaning they work on a single operand, and can apply before or after the operand, as shown in the following pseudocode:

var resultOfOperation = onlyOperand operator;
var resultOfOperation2 = operator onlyOperand;

Examples of unary operators include incrementors and retrieving a type or its size in bytes, as shown in the following code:

int x = 5;
int incrementedByOne = x++;
int incrementedByOneAgain = ++x;
Type theTypeOfAnInteger = typeof(int);
int howManyBytesInAnInteger = sizeof(int);

A ternary operator works on three operands...