The NChartBrushScale class provides scale that transforms values into brushes like a step mapping function. The scale contains array of reference values and array of brushes. It returns brush for given value according to these arrays:

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brushs[n]
  values[n - 1]
...
brushs[4]
  values[3]
brushs[3]
  values[2]
brushs[2]
  values[1]
brushs[1]
  values[0]
brushs[0]

This is equivalent to the following pseudo code:

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if value <= values[0] return brushes[0];
if value > values[i] and value <= values[i + 1] return brush[i + 1];
if value > values[last] return brush[last]

So the array of brushes should contain n elements and array of values should contain n - 1. Values should be sorted (NChartBrushScale does not sort them automatically). If they are not, it can lead to strange results. If brush index goes out of range, null is returned.

public sealed class NChartBrushScale : IClosable

Public NotInheritable Class NChartBrushScale
	Implements IClosable

public ref class NChartBrushScale sealed : IClosable