22.1. Understanding the Disconnected Layer of ADO.NET
As you saw in the previous chapter, working with the connected layer allows you to interact with a database using the primary connection, command, and data reader objects. You can use this handful of classes to select, insert, update, and delete records to your heart's content (as well as invoke stored procedures or perform other data operations [e.g., DDL to create table and DCL to grant permissions]). However, you have seen only part of the ADO.NET story. Recall that you can use the ADO.NET object model in a disconnected manner.
Using the disconnected layer, it is possible to model relational data using an in-memory object model. Far beyond simply modeling a tabular block of rows and columns, ...
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