Is it possible to connect Oracle 11g and DB 9i with VS 2010?

Question

Hi All,

 I am not able to resolve the error of "ORA-12514: TNS:listener does not currently know of service requested in connect descriptor". 

Below Link is the indication,  related to that error.

http://dba-oracle.com/t_ora_12514_tns_listener_does_not_currently_know_service_requested.htm