這本是PDF高清版本，打開后就是pdf文字格式，點擊目錄可以跳轉到所在的那部分內容，還可以復制課本中的內容，省去了看課本時手動敲代碼的麻煩。這本書是高清版英文原著，學習知識和技術特別實用。中文可譯為“在Visual Studio 2017工具下開始學習C#”。下面英文是我復制課本前言的一段話：This book is for everyone who wants to learn how to program in C# using the .NET Framework. It is for absolute beginners who want to give programming a try by learning a clean, modern, elegant programming language. But it is also for people familiar with other programming languages who want to explore the .NET platform, as well as for existing .NET developers who want to give Microsoft's .NET flagship language a try.