Ms charts, display negative data in red.

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C#

Using C# and MS Chart Controls for Dot Net.

I have charts setup to display an 'area' style graph. I want all the area below the 0 index line to be displayed in RED, everything above it in green.



How do I paint all data below the line red?

What I have tried:

I have figured out how to paint the points below the line in red using this code:

foreach (DataPoint dp in chart1.Series["Change"].Points)
  if (dp.YValues[0] < 0)
    dp.Color = Color.Red;

The problem with this is that any negative value heading positive will be painted green so some green is shown below the line.