Possible to rotate chart data label a custom angel?

foreach (Spire.Xls.Charts.ChartSerie cs in chart.Series)
{
//Set vary color of the chart
cs.Format.Options.IsVaryColor = true;
//Set Gap Width
cs.Format.Options.GapWidth = 0;
//Set the value is visible on the chart 
cs.DataPoints.DefaultDataPoint.DataLabels.HasCategoryName = true;
cs.DataPoints.DefaultDataPoint.DataLabels.TextRotationAngle = 270;// <------ Used to rotate the DataLabel Text
cs.DataPoints.DefaultDataPoint.DataFormat.BarType = BaseFormatType.Rectangle;
cs.DataPoints.DefaultDataPoint.DataLabels.VerticalAlignment = FontVertialAlignmentType.Baseline;
cs.DataPoints.DefaultDataPoint.DataLabels.Position = DataLabelPositionType.OutsideBase; 
}