[]
Gets or sets whether the chart group has drop lines.
bool HasDropLines { get; set; }
Property HasDropLines As Boolean
worksheet.Range["A1:C4"].Value = new object[,] {
{"Month", "North", "South"},
{"Jan", 10, 14},
{"Feb", 18, 12},
{"Mar", 15, 20}
};
IChart chart = worksheet.Shapes.AddChart(ChartType.Line, 20, 20, 300, 200).Chart;
chart.SeriesCollection.Add(worksheet.Range["A1:C4"], RowCol.Columns, true, true);
IChartGroup chartGroup = chart.LineGroups[0];
chartGroup.HasDropLines = true;
bool hasDropLines = chartGroup.HasDropLines;