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William R. Vaughn is the principal of Beta V Corporation and a Microsoft MVP who worked at Microsoft for fourteen years. His previous books include six editions of the popular Hitchhiker's Guides (Microsoft Press) and two editions of the bestseller ADO.NET Examples and Best Practices for C# Programmers (APress). Bill is a top-rated speaker at conferences worldwide, including Developer Connections and TechEd, and is the author of numerous articles for SQL Server Magazine, MSDN Online, and others.