Gets properties of the legend entry corresponding to Chart::get_ChartData()->get_Series()[0].DataPoints[index] in case of Chart type from this list: ChartType::BarOfPie, ChartType::ExplodedPie, ChartType::ExplodedPie3D, ChartType::Pie, ChartType::Pie3D, ChartType::PieOfPie; or corresponding to Chart::get_ChartData()->get_Series()[index] for other Chart types....legend entry corresponding to Chart::get_ChartData() ->get_Series()[0]...DataPoints[index] in case of chart type from this list: ChartType::BarOfPie...