I am following the charts documentation and I came upon the following.  Where is SeriesLabelBase?

Customizing Series Points Labels
In our chart, both series display the same series points using Bar and Line series views. However, in this instance we've got the same series points labels shown twice for each series point. To avoid this, select series point labels for Series 2, and set its SeriesLabelBase.Visible property to false.

Hello Jason,

Sorry for the late reply... However, if you or anyone else is still interested in this question, I'll try to explain.

The SeriesLabelBase class is the base class for all series labels, for example for the BarSeriesLabel class. An instance of the BarSeriesLabel class is returned by the Series.Label property if its View is of the BarSeriesView type.

So, if the documentation states that you need to set the SeriesLabelBase.Visible property to false, this means that you need to set the Series.Label.Visible property to false (if a series is currently selected), or simply set the Visible property to false (if a series label is currently selected).