18.1 Comments/Troubleshooting

All Connection objects implement the IDbConnection interface from the System.Data namespace and are thus quite similar. Provider-specific connection objects sometimes differ by adding new informational properties and slightly different methods for supporting transactions and connection pooling.

Some Connection classes for ADO.NET providers are shown in Table 18-1.

Table 18-1. Provider-specific Connection classes

Class	Data source
System.Data.SqlClient.SqlConnection	SQL Server
System.Data.OleDb.OleDbConnection	An OLE DB provider
System.Data.Odbc.OdbcConnection	An ODBC driver
System.Data.OleDb.OracleConnection	Oracle