/// <summary>
/// Does the specified Node or any descendant have a true IsKey value? This will throw an exception for a null node.
/// </summary>
public bool ContainsAnyValues()
{
return(
(Key != null) ||
((LeftChild != null) && LeftChild.ContainsAnyValues()) ||
((MiddleChild != null) && MiddleChild.ContainsAnyValues()) ||
((RightChild != null) && RightChild.ContainsAnyValues())
);
}
