public void Run()
{
producer.InitDataSource();
var observable = producer.Produce();
var ObservablePerson = producer.ObservablePerson();
observable.Subscribe(s => Console.WriteLine(s), () => Console.WriteLine("Completed initial data listings"));
ObservablePerson.Subscribe(p => Console.WriteLine(p.ToString()));
producer.ChangeDataSource();
observable.Subscribe(s => Console.WriteLine(s), () => Console.WriteLine("Completed secondary data listings"));
ObservablePerson.Subscribe(p => Console.WriteLine(p.ToString()));
}