C# 4.0 Unleashed is for anyone who wants to learn the C# programming language in depth, understanding how language features truly work. While giving you those insights, you learn where and how to use the features to design various kinds of software. This book not only teaches the language's capabilities, it also looks behind the scenes to build a solid foundation to aid you in understanding the .NET platform as a whole.
Bart De Smet offers exceptional insight into the features of both the language and Microsoft's broader framework. He doesn't just cover the "what" and "how" of effective C# He explains the "why," so you can consistently choose the right language and platform features, maximizing your efficiency and effectiveness.
The early chapters introduce the .NET platform, the tooling ecosystem, and the C# programming language, followed by in-depth coverage of the C# programming language itself, with immediate application of language features. The last chapters give an overview of the .NET Framework libraries about which every good developer on the platform should know.
This is one of the best technical books I have ever read! The depth at which the material is covered is impressive. I am amazed by the author's knowledge and his willingness to share it through the book. A separate part of the book that I appreciated a lot was all the side notes providing background, history, references to other languages and techniques. One other great thing reflected in the book which I liked very much is the author's interest in functional programming and programming languages, which is one of my biggest passions as well. I cannot recommend this book enough to people interested in C# (there is a lot of things besides C# to learn from this book as well).