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)

Managing memory with reference and value types

There are two categories of memory: stack memory and heap memory. With modern operating systems, the stack and heap can be anywhere in physical or virtual memory.

Stack memory is faster to work with (because it is managed directly by the CPU and because it uses a first-in, first-out mechanism, it is more likely to have the data in its L1 or L2 cache) but limited in size, while heap memory is slower but much more plentiful. For example, on my macOS, in Terminal, I can enter the command: ulimit -a to discover that stack size is limited to 8,192 KB and other memory is "unlimited." This is why it is so easy to get a "stack overflow."

There are two C# keywords that you can use to create object types: class and struct. Both can have the same members, such as fields and methods. The difference between the two is how memory is allocated.

When you define a type using class, you are defining a reference type...