Chart for WPF and Silverlight / Chart Types / Pie Charts / Adding Labels to Pie Charts
Adding Labels to Pie Charts

To change the offset for all Pie slices, use the following code

C#
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chart.DataContext = new double[] { 1, 2, 3 };
      chart.ChartType = ChartType.Pie;
      chart.Loaded += (s, e) => ((BasePieRenderer)chart.Data.Renderer).Offset = 0.1;