static void Main(string[] args) { const string dataSource = "(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=JAVIER-HP)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=XEPDB1)))"; OracleDatabase db = new OracleDatabase(); System.Console.WriteLine(db.IsConnected()); try { db.Connect("risk", "ruffus", dataSource); db.ExecuteSQLCount("t_usuarios", "1=1"); db.Disconnect(); } catch (OracleDatabaseException) { System.Console.WriteLine("Hubo un error"); } }