VB .NET - Os principais namespaces do ADO.NET

System.Data
System.Data.OleDb
System.Data.Odbc
System.Data.OracleClient
System.Data.SqlClient



Com isso, os objetos pertencentes aos Managed Providers possuem nomes
com prefixos diferentes para cada classe:

Connection

SqlClient : SqlConnect ion

OracleClient : OracleConnect ion

OleDB: OleDbConnect ion

Odbc: OdbcConnect ion

Command     

SqlClient : SqlCommand

OracleClient : OracleCommand

OleDB: OleDbCommand

Odbc: OdbcCommand

DataAdapter

SqlClient : SqlDataAdapter

OracleClient : OracleDataAdapter

OleDB: OleDbDataAdapter

Odbc: OdbcDataAdapter

DataReader

SqlClient : SqlDataReader

OracleClient : OracleDataReader

OleDB: OleDbDataReader

Odbc: OdbcDataReader