Hello Bill,
Actually, you shouldn't have to do this. The legend items are controlled by the
SeriesDefinition.LegendDisplayMode property. For pie and doughnut series definition this property is set
LegendDisplayMode.DataPointLabel by default, so for each slice there is an item in the legend and this item is automatically styled by RadChart to match the style of the corresponding chart item.
Regards,
Ves
the Telerik team