Essential C# 4.0 完美版 附件里有两个pdf，内容完全一样，似乎清晰度不一样 984 pages Publisher: Addison-Wesley Professional; 3 edition (March 20, 2010) Language: English ISBN-10: 0321694694 ISBN-13: 978-0321694690 Following an introduction to C#, readers learn about Best practices for object-oriented programming in C#