public QheDautheQloiBhytCollection FetchAll()
 {
     QheDautheQloiBhytCollection coll = new QheDautheQloiBhytCollection();
     Query qry = new Query(QheDautheQloiBhyt.Schema);
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }
 public QheDautheQloiBhytCollection FetchByQuery(Query qry)
 {
     QheDautheQloiBhytCollection coll = new QheDautheQloiBhytCollection();
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }
 public QheDautheQloiBhytCollection FetchByID(object MaDoituongbhyt)
 {
     QheDautheQloiBhytCollection coll = new QheDautheQloiBhytCollection().Where("ma_doituongbhyt", MaDoituongbhyt).Load();
     return coll;
 }