Introduction

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It is a capital mistake to theorize before one has data.

”Sherlock Holmes, "Scandal in Bohemia"

Just as in Holmes' chosen field of detection, retrieving and manipulating data is a prerequisite for building modern business applications. This explains why ADO.NET, Microsoft's data access technology for the .NET Framework and Visual Studio .NET, is perhaps the most talked and written about, critiqued, and, I'd venture to say, important aspect of Microsoft's newly released developer suite of tools.

Understanding ADO.NET is critical to successfully developing the full range of .NET applications, from Windows Forms to ASP.NET Web Forms to XML Web Services, and in a nutshell is why this book exists. To put it simply, this book can be used as a guide for understanding not only the architecture and syntax of ADO.NET, but also how it can be used to build modern multi- tier applications.

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