PieChart : Chart
      (static) PersistableObject Construct()
      (ctor) PieChart()
      (ctor) PieChart( string name, string fileName, bool showPercents )
      bool ShowPercents( get; set; )
      PersistableType TypeID( get; )
      virtual void DeserializeAttributes( PersistanceReader ip )
      virtual void SerializeAttributes( PersistanceWriter op )