public void AddData() { dc.DataSeriesList.Clear(); // Add Sine data with 31 data point: DataSeries ds1 = new DataSeries(); ds1.LineStyle.LineColor = Color.Red; ds1.LineStyle.Thickness = 2f; ds1.LineStyle.Pattern = DashStyle.Dash; for (int i = 0; i < 31; i++) { ds1.AddPoint(new PointF(i / 5.0f, (float)Math.Sin(i / 5.0f))); } dc.Add(ds1); // Add Cosine data with 40 data point: DataSeries ds2 = new DataSeries(); ds2.LineStyle.LineColor = Color.Blue; ds2.LineStyle.Thickness = 1f; ds2.LineStyle.Pattern = DashStyle.Solid; for (int i = 0; i < 40; i++) { ds2.AddPoint(new PointF(i / 5.0f, (float)Math.Cos(i / 5.0f))); } dc.Add(ds2); }