这是一本c#的学习书籍，21天让你学好c#,当时给了我很大的帮助，希望能帮到你-This is a book to learn c#, 21 days for you to learn c#, then gave me a great help, hope you can help

21天学会C++第六版的全部源代码，非常难得-21 days the Society C++ sixth version of the full source code, very rare