public void SaveCourse(CourseDTO trab) { string query = "INSERT INTO TB_CURSO (nm_nome, nm_endereco, nm_celular, nr_data, nr_telefone) VALUES ('{0}', '{1}', '{2}', '{3}', '{4}' )"; query = string.Format(query, trab.Name, trab.Phone, trab.Address, trab.CellPhone, trab.renewal); SchoolDatabase d = new SchoolDatabase(); d.ExecuteInsert(query); }