Book Image

C# 9 and .NET 5 – Modern Cross-Platform Development - Fifth Edition

By : Mark J. Price
Book Image

C# 9 and .NET 5 – Modern Cross-Platform Development - Fifth Edition

By: Mark J. Price

Overview of this book

In C# 9 and .NET 5 – Modern Cross-Platform Development, Fifth 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 a new chapter on the Microsoft Blazor framework. The book’s first part teaches the fundamentals of C#, including object-oriented programming and new C# 9 features such as top-level programs, target-typed new object instantiation, and immutable types using the record keyword. Part 2 covers the .NET APIs, for performing tasks like managing and querying data, monitoring and improving performance, and working with the file system, async streams, serialization, and encryption. Part 3 provides examples of cross-platform apps you can build and deploy, such as websites and services using ASP.NET Core or mobile apps using Xamarin.Forms. The best type of application for learning the C# language constructs and many of the .NET libraries is one that does not distract with unnecessary application code. For that reason, the C# and .NET topics covered in Chapters 1 to 13 feature console applications. In Chapters 14 to 20, having mastered the basics of the language and libraries, you will build practical applications using ASP.NET Core, Model-View-Controller (MVC), and Blazor. By the end of the book, you will have acquired the understanding and skills you need to use C# 9 and .NET 5 to create websites, services, and mobile apps.
Table of Contents (23 chapters)

Encrypting and decrypting data

In .NET, there are multiple encryption algorithms you can choose from.

In legacy .NET Framework, some algorithms are implemented by the operating system and their names are suffixed with CryptoServiceProvider. Some algorithms are implemented in the .NET BCL and their names are suffixed with Managed.

In modern .NET, all algorithms are implemented by the operating system. If the OS algorithms are certified by the Federal Information Processing Standards (FIPS), then .NET uses FIPS-certified algorithms.

Generally, you will always use an abstract class like Aes and its Create factory method to get an instance of an algorithm so you will not need to know if you are using CryptoServiceProvider or Managed anyway.

Some algorithms use symmetric keys, and some use asymmetric keys. The main asymmetric encryption algorithm is RSA.

Symmetric encryption algorithms use CryptoStream to encrypt or decrypt large amounts of bytes efficiently. Asymmetric...