//------
private void addNodes(EmpNode nod, AbstractEmployee emp)
{
AbstractEmployee newEmp;
EmpNode newNode;
IEnumerator empEnum;
empEnum = emp.getSubordinates();
while (empEnum.MoveNext())
{
newEmp = (AbstractEmployee)empEnum.Current;
newNode = new EmpNode(newEmp);
nod.Nodes.Add(newNode);
addNodes(newNode, newEmp);
}
}