// works in Revit Structure 2009 API, but not in 2010:
bool IsColumnRound(
FamilySymbol symbol)
{
GenericFormSet solid = symbol.Family.SolidForms;
GenericFormSetIterator i = solid.ForwardIterator();
i.MoveNext();
Extrusion extr = i.Current as Extrusion;
CurveArray cr = extr.Sketch.CurveLoop;
CurveArrayIterator i2 = cr.ForwardIterator();
i2.MoveNext();
String s = i2.Current.GetType().ToString();
return(s.Contains("Arc"));
}
