The Radar graph or series is used to represent a one-dimensional data set as points on
axes starting from the center of the graph. It has only one series
component, Performance. The data in this component specify the positions of
the points on the corresponding axes. It also has an optional series component called LabelMember
whose data may be used as the mark labels for the points.
The points on the axes may be connected with a line whose appearance is
determined by the Pen property. The Brush property determines the
appearance of the area enclosed by this line.