void ToolTipController_ToolTipOpening(object sender, ChartToolTipEventArgs e)
{
ToolTipData toolTipData = e.Hint as ToolTipData;
int colorNumber = e.Series.Points.IndexOf(e.SeriesPoint);
Color seriesColor = e.ChartControl.Palette[colorNumber];
toolTipData.SeriesBrush = new SolidColorBrush(seriesColor);
}
public G8Member(List <GDP> GDPs)
{
this.toolTipData = new ToolTipData(GDPs, GDPs[0].Country);
this.countryName = GDPs[0].Country;
this.gdpIn2010 = GDPs[9].Product;
}