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)

Understanding iteration statements

Iteration statements repeat a block of statements either while a condition is true or for each item in a collection. The choice of which statement to use is based on a combination of ease of understanding to solve the logic problem and personal preference.

Looping with the while statement

The while statement evaluates a Boolean expression and continues to loop while it is true. Let's explore iteration statements.

  1. Create a new folder and console application project named IterationStatements and add it to the workspace.
  2. Type the following code inside the Main method:
    int x = 0;
    while (x < 10)
    {
      WriteLine(x);
      x++;
    }
  3. Run the console application and view the results, which should be the numbers 0 to 9, as shown in the following output:
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9

Looping with the do statement

The do statement is like while, except the Boolean expression is checked at the bottom of the block instead of the top, which...