public void delete(Marca marca)
 {
     FbConnection conn = ConnectionFactory.getConnection();
     FbCommand query = new FbCommand(DELETE, conn);
     try
     {
         query.Parameters.AddWithValue("@codMarca", marca.getCodMarca());
         conn.Open();
         query.ExecuteNonQuery();
     }
     catch (FbException ex)
     {
         ex.Message.ToString();
     }
     finally
     {
         ConnectionFactory.closeAll(conn, query);
     }
 }
 public Marca selectById(Marca marca)
 {
     FbConnection conn = ConnectionFactory.getConnection();
     FbCommand query = new FbCommand(SELECTBYID, conn);
     FbDataReader reader = null;
     try
     {
         query.Parameters.AddWithValue("@codMarca", marca.getCodMarca());
         conn.Open();
         reader = query.ExecuteReader();
         if (reader.Read()) {
             marca.setCodMarca(int.Parse(reader["codMarca"].ToString()));
             marca.setDescricao(reader["descricao"].ToString());
         }
     }
     catch (FbException ex)
     {
         ex.Message.ToString();
     }
     finally
     {
         ConnectionFactory.closeAll(conn, query, reader);
     }
     return marca;
 }