Instruct: Classify a given Amazon review as either positive or negative.
Query: Obsolete already

While the author seems to cover the topics well, including good useable code examples, much of the information is already obsolete. He obviously wrote this while the C# language was still in Beta 1, because many of the classes and methods he uses were removed, replaced, or renamed as of Beta 2. I can't believe they published a book written about a language before the language was officially finalized and released. It's very difficult to search the Internet, MSDN, etc. for all of the "equivalent" classes for the outdated ones the author uses... I recommend you find a newer and more accurate book.