(ctor) Chart()
      string FileName( get; set; )
      ChartItemCollection Items( get; )
      string Name( get; set; )
      virtual void DeserializeAttributes( PersistanceReader ip )
      virtual void DeserializeChildren( PersistanceReader ip )
      virtual void SerializeAttributes( PersistanceWriter op )
      virtual void SerializeChildren( PersistanceWriter op )