Questão: Na classe de conexão com o banco de dados de uma aplicação C...

I - SqlConnection

II - Sql Connection conn = new Sql Connection ( @ " Data Source = . SQLEXPRESS ; Initial Catalog = DB_TRF3 ; Integrated Security = True ; Pooling = False " ) 

I - Connection

II - Connection conn = new Connection.getConnection (@ "Data Source = . SQLEXPRESS ; Initial Catalog = DB_TRF3 ; Integrated Security = True ; Pooling = False " ) ;

I - ODBCConnection

II - ODBCConnection conn = new ODBCConnection (@"Data Source = . SQLEXPRESS ; Initial Catalog = DBTRF3 / D i g i t a l S e c u r i t y = T r u e ; P o o l i n g = T r u e " );

I - Connection

II - Connection conn = Driver Manager .get Connection ("odbc : sqlserver ://localhost: 1433 /DB _TRF3" , "root " , " ");

I - SqlConnection

II - Sql Connection conn = DriverManager.get SqlConnection( "odbc : sqlserver:// localhost : 1433 / DB_TRF3" , "root " , " ");