Coba ikuti string koneksi
string con = "Data Source=(DESCRIPTION =(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST = 000.00.0.00)(PORT = 0000)))(CONNECT_DATA =(SERVICE_NAME = database)));User ID=User/Schema;Password=password;Unicode=True";
&kemudian gunakan string koneksi ini sebagai berikut
using (OracleConnection objConn = new OracleConnection(con))
{
\\ code
}