public void Add(SIProlog.Part part)
{
if (part is SIProlog.PartListImpl)
{
throw ErrorBadOp("inner partlist");
}
tlist.Add(part);
}
public void Insert(int i, SIProlog.Part part)
{
if (i == Count)
{
Add(part);
return;
}
throw ErrorBadOp("inserting outof order");
}