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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