ADO.NET - A Data Access Layer

Developing applications for SQL Server usually results in a variety of access methods that the programmers use. A data access layer class, given to the developers, is usually seen as the best practice, but one that isn't usually implemented. In fact, in most software I've built, each developer uses his own method, or may cut and paste from another, but rarely is there a central access class. New Author Patryk Nowakowski brings us his solution using ADO.NET.