Extend array of points in series. Use this method to provide additional data for series. This method is called after you call NChart.ExtendData(). The points from the array returned are _added_ to the series' array of points, so series will have more data. The maximal length of data array is determined by PointsHistoryLength property of NChart.

Get image for the series that is displayed in the legend. If null is returned or method is not implemented the default image is used.

Get name for the series.

Get array of points for the series.