Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Highly ineffective

This book is highly innefective for it's desired purpose. I had been under the assumption from the title that this book would help me implement XML databases/datastores into my C# site. My intentions ranged from reading user names and passwords from XML files for authentication, to transforming entire XML pages into XHTML with C#. If you have any of the same desires, DO NOT BUY THIS BOOK.In addition to being horribly written, convoluted, and cryptic, the book is not "written with VB and C# examples." Some code is VB and some is C#, yes, but nothing is written for both. For example, one section I wanted to implement was written in VB. Period. No C# alternative, not even a mention of C#. Move on, next topic. I was stuck trying to convert their (poorly written) VB to C#. That shouldn't happen. This book is terrible.