/// 
 /// <param name="employee"></param>
 /// <param name="ward"></param>
 public void AddEmployee(Employee employee, Ward ward)
 {
 }
 /// 
 /// <param name="employee"></param>
 public void RemoveEmployee(Employee employee)
 {
 }
 /// 
 /// <param name="sourceEmployee"></param>
 /// <param name="targetEmployee"></param>
 public void UpdateEmployee(Employee sourceEmployee, Employee targetEmployee)
 {
 }