Hi rob,
1. Use the following code snippets to enable the category name in the pie chart.
[c#]
//setting value Label
serieOne.DataPoints.DefaultDataPoint.DataLabels.IsValue=true;
//Setting category name
serieOne.DataPoints.DefaultDataPoint.DataLabels.IsCategoryName=true;
//Setting series name.
serieOne.DataPoints.DefaultDataPoint.DataLabels.IsSeriesName=true;
Here is a sample for your reference:
Chart_Labels.zip
2. Currently we do not provide support for leader lines. Sorry for inconvenience.
Thanks,
Melba