public GenericRepository(QL_NHAHANGEntities3 _enitity)
 {
     this._entity = _entity;
     table        = _enitity.Set <T>();
 }
 public GenericRepository()
 {
     this._entity = new QL_NHAHANGEntities3();
     table        = _entity.Set <T>();
 }