Indeed these code snippets are applicable for RadChart for ASP.NET AJAX and not WinForms. However the properties that you have to set are absolutely the same.
property specifies degrees for the rotation of the pie. The default value and the starting position is 0°. Positive values of the StartAngle
property will rotate the pie clockwise and negative - counterclockwise:
ChartSeries chartSeries1 = new ChartSeries();
chartSeries1.Type = ChartSeriesType.Pie;
chartSeries1.Appearance.StartAngle = 280;
As for the Legend - you should be able to achieve this with the Legend's Appearance.Position
the Telerik team