Summary
Building enterprise applications requires a structured approach that allows you to isolate code that you write into distinct services so that your application is maintainable, flexible, and scalable in the face of new requirements and increased workloads. Using a multi-tier architecture gives you a mental map of how to accomplish this and therefore provides a ready-made foundation for building applications.
ADO.NET will be used primarily in the data services tier of a multi-tier application, although there are several design decisions you can make that affect how the other tiers interact with the data services tier. These include the external perspective that relates to how the data will be exposed and the internal perspective as to how ...
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