while trying to develop my own series for the charting component, I noted some obstacles. Ie - I was trying to reuse some of the code from areaseries (the class is apparently sealed) and when doing so, I've noted that:
a) The property PlotArea is internal - why?
b) The class ValueHelper is internal - why?
c) DataPointsByIndependentValue is internal - Why?
I'm not quite sure why these members / classes need to be internal. I think it would facilitate the development if those would be public.