Object available in ADO.Net:-

SN0	Object Name	Class(as) Name(s)
01	Connection	SqlConnection/oracle connection/OLEDB connection/ODBC connection
02	Command	SqlCommand/oracle command/OLEDB command/ODBC command
04	Parameter	SqlParameter/oracle parameter/OLEDB parameter/ODBC parameter
05	Data Reader	SqlDataReader/oracle Data Reader/OLEDB Data Reader/ODBC Data Reader
06	Data Adapter	SqlDataAdapter/oracle Data Adapter/OLEDB Data Adapter/ODBC Data Adapter
07	Dataset	Dataset
09	DataTable	DataTable
10	DataView	DataView
11	DataColumn	DataColumn
12	DataRow	DataRow
13	Constraint	Constraint

         ADO.NET Architecture:-