public double StrokeThickness {get; set;}

private double strokeThickness;
private Brush stroke;
private Brush fillBrush;
private double chartFontSize;
private double axisFontSize;
private FontFamily fontFamily;        
private Brush foreground;

strokeThickness = 2;
stroke = new SolidColorBrush(Windows.UI.Colors.Green);
fillBrush = new SolidColorBrush(Windows.UI.Colors.Red);
foreground = new SolidColorBrush(Windows.UI.Colors.Blue);
chartFontSize = 25;
axisFontSize = 25;
fontFamily = new FontFamily("Arial Narrow");
Windows.UI.Text.FontStyle fontStyle = Windows.UI.Text.FontStyle.Italic;
Windows.UI.Text.FontWeight fontWeight = Windows.UI.Text.FontWeights.Bold;
Windows.UI.Text.FontStretch fontStretch = Windows.UI.Text.FontStretch.ExtraExpanded;

GrapeCity.Xaml.SpreadSheet.Data.SpreadChart chart = new GrapeCity.Xaml.SpreadSheet.Data.SpreadChart("Chart", GrapeCity.Xaml.SpreadSheet.Data.SpreadChartType.BarStacked, "Sheet1!$A$1:$A$7", 0, 0, 200, 200);
gcSpreadSheet1.ActiveSheet.SetArray(0, 0, new object[,] { { 1 }, { 2 }, { 3 }, { 4 }, { 5 }, { 6 }, { 7 }, { 8 }, { 9 }, { 10 } });

//stroke
chart.StrokeDashType = GrapeCity.Xaml.SpreadSheet.Data.StrokeDashType.Dot;
chart.StrokeThickness = strokeThickness;
chart.Stroke = stroke;
////fill
chart.Fill = fillBrush;
chart.FontSize = chartFontSize;
chart.FontFamily = FontFamily;
chart.FontStyle = fontStyle;
chart.FontWeight = fontWeight;
chart.FontStretch = fontStretch;
chart.Foreground = foreground;

gcSpreadSheet1.ActiveSheet.Charts.Add(chart);