Used to remove, modify or change the order of both custom and default legend items in the CustomizeLegend event. Can also be used to add custom legend items.
Assembly: System.Web.DataVisualization (in System.Web.DataVisualization.dll)
The property allows you to delete or modify both default and custom legend items in the CustomizeLegend event, and to add custom legend items. The order of legend items can also be changed.
The SeriesPointIndex and [LegendItem.SeriesPointIndex] properties can be used to determine the data element that is associated with a default legend item. These properties will return zero-length strings for custom legend items, because custom items are not associated with chart data.