Thanks for the answer, would you have any piece of code to start to work with?

Thanks

It's Infragistics.UltraChart.Core.Primitives

Hi,

Thanks so much for the code but what is the namespace to use for primitive  ?
using System.???

In this case you can try something like: 

protected void Page_Load(object sender, EventArgs e)

    {

        this.UltraChart1.ChartType = ChartType.ParetoChart;

        this.UltraChart1.DataSource = DemoTable.AllPositive();

        this.UltraChart1.DataBind();

        this.UltraChart1.FillSceneGraph += new FillSceneGraphEventHandler(UltraChart1_FillSceneGraph);

    }

    private void UltraChart1_FillSceneGraph(object sender, FillSceneGraphEventArgs e)

    {

        List<Primitive> primitives = new List<Primitive>();

        foreach (Primitive primitive in e.SceneGraph)

        {

            Polyline polyline = primitive as Polyline;

            if (polyline == null)

            {

                continue;

            }

            foreach (DataPoint dataPoint in polyline.points)

            {

                double value = Math.Round((double)dataPoint.Value);

                string strValue = string.Format("{0}%", value);

                Ellipse ellipse = new Ellipse(dataPoint.point, 20);

                ellipse.PE = new PaintElement(Color.Yellow);

                primitives.Add(ellipse);

                Text text = new Text(dataPoint.point, strValue);

                text.labelStyle.HorizontalAlign = StringAlignment.Center;

                text.labelStyle.VerticalAlign = StringAlignment.Center;

                primitives.Add(text);

            }

        }

        foreach (Primitive primitive in primitives)

        {

            e.SceneGraph.Add(primitive);

        }

    }

DataTable table = Infragistics.UltraChart.Data.DemoTable.AllPositive();
this.ultraChart1.Data.DataSource = table;
this.ultraChart1.Data.DataBind();
this.ultraChart1.ChartType = ChartType.ParetoChart;

for (int current = 0; current < table.Columns.Count; current++)
{
    BoxAnnotation anno = new BoxAnnotation();
    anno.Text = table.Rows[0][current].ToString();
    anno.Location.Type = LocationType.RowColumn;
    anno.Location.Row = 0;
    anno.Location.Column = current;
    anno.PE = new PaintElement(Color.Yellow);
    this.ultraChart1.Annotations.Add(anno);
}