public static void UnitTest()
{
Console.WriteLine("Start Unit Test");
ConcreteMediator pMediator = new ConcreteMediator();
ConcreteColleague1 pColleague1 = new ConcreteColleague1(pMediator);
ConcreteColleague2 pColleague2 = new ConcreteColleague2(pMediator);
pMediator.SetColleague1(pColleague1);
pMediator.SetColleague2(pColleague2);
pColleague1.Action();
pColleague2.Action();
}