FarPoint.Win.Chart.PieSeries series = new FarPoint.Win.Chart.PieSeries(); private void Form1_Load(object sender, EventArgs e) { series.SeriesName = "Series 1"; series.TopBevel = new FarPoint.Win.Chart.CircleBevel(12.0f, 12.0f); series.BottomBevel = new FarPoint.Win.Chart.CircleBevel(12.0f, 12.0f); series.Values.Add(1.0); series.Values.Add(2.0); series.Values.Add(4.0); series.Values.Add(8.0); FarPoint.Win.Chart.PiePlotArea plotArea = new FarPoint.Win.Chart.PiePlotArea(); plotArea.Location = new PointF(0.2f, 0.2f); plotArea.Size = new SizeF(0.6f, 0.6f); plotArea.series.Add(series); FarPoint.Win.Chart.ChartModel model = new FarPoint.Win.Chart.ChartModel(); model.PlotAreas.Add(plotArea); fpChart1.Model = model; } private void button1_Click(object sender, EventArgs e) { series.Values.Clear(); } private void button2_Click(object sender, EventArgs e) { series.Values[3] = 1; } private void button3_Click(object sender, EventArgs e) { double v; v = series.Values[3]; textBox1.Text = v.ToString(); }