setGeneralLabelStyleProperties

setGenerallabelStyleProperties

 public void setGeneralProperties(ObjectId labelStyleId, string textStyle, string layer, bool visiblity,
   Autodesk.Civil.OrientationReferenceType orientationReference, bool planReadability, double prBias
   )
{
    Document acadDoc = Application.DocumentManager.MdiActiveDocument;
    CivilDocument civilDoc = CivilApplication.ActiveDocument;
    using (Transaction trans = acadDoc.Database.TransactionManager.StartOpenCloseTransaction())
    {
      LabelStyle lblstyle = trans.GetObject(labelStyleId, OpenMode.ForWrite) as LabelStyle;
      lblstyle.Properties.Label.TextStyle.Value = textStyle;
      lblstyle.Properties.Label.Layer.Value = layer;
      lblstyle.Properties.Label.Visibility.Value = visiblity;
      lblstyle.Properties.Behavior.OrientationReference.Value = orientationReference;
      lblstyle.Properties.Behavior.InsertOption.Value = Autodesk.Civil.LabelInsertionType.None;
      lblstyle.Properties.PlanReadability.PlanReadable.Value = planReadability;
      prBias = convertDegreeToRadian(prBias);
      lblstyle.Properties.PlanReadability.PlanReadableBias.Value = prBias;
      trans.Commit();
    }
}

public double convertDegreeToRadian(double degree)
{
 // degree * (pi /180) = radian
  double radian = degree * (System.Math.PI / 180);
  return radian;
}