I have a chart with 5 lines, I need to be able to do NullHandling.InterpolateSimple on 2 of my lines and then NullHandling.DontPlot on 3 of them. I assume the only way to do this is with a composite chart consisting of 5 different line charts with the appropriate NullHandling method set on each? If so, how do I create these separate line charts? I have messed w/this all day and can't even get 1 to draw :(  My code I have is below...all I get is the axis but no line.   What am I missing? And once i get this one line working do i just repeat all the code for the remaining 4 lines?

//
// Dev Target
//

DataTable dt = new DataTable();

dt.Columns.Add("Date", typeof(string));
dt.Columns.Add("Value", typeof(int));

dt.Rows.Add(new object[] { "10/31/2011", 2099});
dt.Rows.Add(new object[] { "11/08/2011", null});
dt.Rows.Add(new object[] { "11/15/2011", 2400 });
dt.Rows.Add(new object[] { "11/22/2011", null });
dt.Rows.Add(new object[] { "11/30/2011", 2800 });
dt.Rows.Add(new object[] { "12/07/2011", null });
dt.Rows.Add(new object[] { "12/15/2011", 2999 });
dt.Rows.Add(new object[] { "12/22/2011", null });
dt.Rows.Add(new object[] { "12/31/2011", 3250 });

//
// First chart area
//

ultraChart1.ChartType = ChartType.Composite;

ChartArea devTargetArea = new ChartArea();
ultraChart1.CompositeChart.ChartAreas.Add(devTargetArea);

//
// Axis...
//

AxisItem xAxis = new AxisItem();
xAxis.OrientationType = AxisNumber.X_Axis;
xAxis.DataType = AxisDataType.Numeric;
xAxis.Labels.ItemFormatString = "";
xAxis.Labels.Orientation = TextOrientation.VerticalLeftFacing;
xAxis.Extent = 40;
ultraChart1.CompositeChart.ChartAreas[0].Axes.Add(xAxis);

AxisItem yAxis = new AxisItem();
yAxis.OrientationType = AxisNumber.Y_Axis;
yAxis.DataType = AxisDataType.Numeric;
yAxis.TickmarkStyle = AxisTickStyle.Smart;
yAxis.Labels.HorizontalAlign = System.Drawing.StringAlignment.Near;
yAxis.Labels.VerticalAlign = System.Drawing.StringAlignment.Near;
yAxis.Labels.Layout.Behavior = AxisLabelLayoutBehaviors.Auto;
yAxis.Labels.Visible = true;
yAxis.Labels.ItemFormat = AxisItemLabelFormat.DataValue;
yAxis.MajorGridLines.Visible = true;
ultraChart1.CompositeChart.ChartAreas[0].Axes.Add(yAxis);

//
// Create the series
//

NumericSeries devTargetSeries = new NumericSeries();
devTargetSeries.Data.DataSource = dt;
devTargetSeries.Data.LabelColumn = "Date";
devTargetSeries.Data.ValueColumn = "Value";
ultraChart1.CompositeChart.Series.Add(devTargetSeries);

ChartLayerAppearance devTargetLayer = new ChartLayerAppearance();
devTargetLayer.ChartType = ChartType.LineChart;
devTargetLayer.ChartArea = ultraChart1.CompositeChart.ChartAreas[0];
devTargetLayer.AxisX = xAxis;
devTargetLayer.AxisY = yAxis;
devTargetLayer.Series.Add(devTargetSeries);
ultraChart1.CompositeChart.ChartLayers.Add(devTargetLayer);

LineChartAppearance lcp = new LineChartAppearance();
lcp.DrawStyle = LineDrawStyle.Solid;
lcp.MidPointAnchors = false;
lcp.Thickness = 4;
lcp.NullHandling = NullHandling.InterpolateSimple;
devTargetLayer.ChartTypeAppearance = lcp;