public virtual object Clone()
{
BuilderDirectory dir = new BuilderDirectory(m_strName, m_Parent, m_Removable);
foreach (IBuilder builder in SubList)
{
dir.SubList.Add(builder.Clone() as BuilderDirectory);
}
foreach (IBuilder builder in LayerBuilders)
{
dir.LayerBuilders.Add(builder.Clone() as LayerBuilder);
}
return dir;
}