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)

Hashing data

In .NET Core, there are multiple hash algorithms you can choose from. Some do not use any key, some use symmetric keys, and some use asymmetric keys.

There are two important factors to consider when choosing a hash algorithm:

  • Collision resistance: How rare is it to find two inputs that share the same hash?
  • Preimage resistance: For a hash, how difficult would it be to find another input that shares the same hash?

Some common non-keyed hashing algorithms are shown in the following table:

Algorithm Hash size Description


16 bytes

This is commonly used because it is fast, but it is not collision-resistant


20 bytes

The use of SHA1 on the internet has been deprecated since 2011