Adds a spline curve to the current figure. A cardinal spline curve is used because the curve travels through each of the points in the array.
public void AddCurve(
An array of PointF structures that represents the points that define the curve.
The user must keep the original points if they are needed. The original points are converted to cubic Bézier control points internally, therefore there is no mechanism for returning the original points.
For an example, see AddCurve(Point, Int32, Int32, Single).