C# in a Nutshell
C# in a Nutshell was inevitable, much like the dawn or your liability for income tax. As the C# language has gathered speed--it's one of the languages that Microsoft encourages you to use for .NET development--its users have anticipated the release of an authoritative reference for the language and its key APIs. That's what this book is: a reference, meant to give you a few chapters on basic structure and syntax before launching into categorized and alphabetized listings of classes and their members. It's sufficiently well written and organized that, given experience with other distributed application environments and some knowledge of .NET, you could learn the language from this book alone. However, this is not a tutorial for people new to Microsoft programming, or new to network computing.
Link:
http://rapidshare.de/files/12513004/O_Reilly_-_C_Sharp_In_a_Nutshell.rar