As you are now starting with our chart controls, I would strongly recommend using RadPieChart
, part of RadChartView
. RadChartView is newer control (actually this is the name for a set of controls - RadPieChart, RaPolarChart and RadCartesianChart - serving different needs), designed to meet requirements, which could not be fulfilled with RadChart. You can find a detailed comparison here
. In addition, I have attached a small example, which addresses the issues you have pointed, using RadPieChart.
the Telerik team