The BCL includes a set of classes that access data sources and manage complex data sets. Known as ADO .NET, these classes are the managed replacement for ADO under Win32. ADO+ supports both connected and disconnected operations, multiple data providers (including nonrelational data sources), and serialization to and from XML.

For more information, see the following namespaces:

System.Data
System.Data.ADO
System.Data.ADO.Interop
System.Data.CodeGen
            System.Data.Design
System.Data.Internal
System.Data.SQL
System.Data.SQLTypes