Chapter 35. The System.Data.Common Namespace
This
namespace includes some of the base classes that define common
ADO.NET functionality for provider-specific objects. For example,
you’ll find DataAdapter, which
is the root for classes such as
System.Data.SqlClient.SqlDataAdapter and
System.Data.OleDb.OleDbDataAdapter. However, many
connection-specific classes don’t derive from a base
class. Instead, they implement a common interface, such as
System.Data.IDbConnection (implemented by
System.Data.SqlClient.SqlConnection and
System.Data.OleDb.OleDbConnection).
The System.Data.Common namespace does include a
few classes that are generic to all data providers. Namely, these are
the DataColumnMapping and
DataTableMapping classes, which allow you to map
table names and column names in the DataSet.
These classes are used by the provider-specific objects but are
completely generic. Figure 35-1 shows the types in
this namespace.
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