How to: Create a 2D Pie (Donut) Chart
The following example demonstrates how to create a 2D Pie (Donut) chart. To do this, it is necessary to assign the ChartControl.Diagram property to SimpleDiagram2D, and then add two PieSeries2D objects with points to the diagram's Diagram.Series collection.
Also, this example shows how to add a legend (showing series names) to a chart.