GrapeCity.Windows.SpreadSheet.Data.SpreadDataSeries ds1 = new GrapeCity.Windows.SpreadSheet.Data.SpreadDataSeries();
ds1.Values = new GrapeCity.Windows.SpreadSheet.Data.DoubleSeriesCollection();
ds1.Values.Add(2);
ds1.Values.Add(3);
ds1.Values.Add(5);
GrapeCity.Windows.SpreadSheet.Data.SpreadDataSeries ds2 = new GrapeCity.Windows.SpreadSheet.Data.SpreadDataSeries();
ds2.Values = new GrapeCity.Windows.SpreadSheet.Data.DoubleSeriesCollection();
ds2.Values.Add(3);
ds2.Values.Add(6);
ds2.Values.Add(4);
GrapeCity.Windows.SpreadSheet.Data.SpreadDataSeries ds3 = new GrapeCity.Windows.SpreadSheet.Data.SpreadDataSeries();
ds3.Values = new GrapeCity.Windows.SpreadSheet.Data.DoubleSeriesCollection();
ds3.Values.Add(5);
ds3.Values.Add(1);
ds3.Values.Add(3);
GrapeCity.Windows.SpreadSheet.Data.SpreadSurfaceChart schart = new GrapeCity.Windows.SpreadSheet.Data.SpreadSurfaceChart("SChart", GrapeCity.Windows.SpreadSheet.Data.SpreadSurfaceChartType.Surface, 0, 0, 300, 300);
schart.ContourLevelsCount = 5;
schart.CornerRadius = 60;
schart.DataSeries.Add(ds1);
schart.DataSeries.Add(ds2);
schart.DataSeries.Add(ds3);
GcSpreadSheet1.ActiveSheet.SurfaceCharts.Add(schart);