public void MakeMeAChildOf(IAmANodeInATree <T> parent)
{
if (!IsRoot)
{
throw new ArgumentException("This node [{0}] already has a parent".FormatInvariant(parent), "parentNode");
}
parent.AddChild(this);
}
public void AddLastSibling(IAmANodeInATree <T> child)
{
Parent.AddChild(child);
}