Implementing the Data Access Layer

In the past several chapters, you have looked at various object-oriented programming constructs such as classes, inheritance, and polymorphism as they are implemented in C# code. You have been introduced to and practiced using the Visual Studio integrated development environment. You should also have a firm understanding of how class structures and object collaboration are implemented.

You are now ready to put the pieces together and develop a working application. Because most business applications involve working with and updating data in a back-end relational database, you will look at how the ...

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