public static void Run()
{
Console.Clear();
Child1 c1 = new Child1("C1", 20);
Child2 c2 = new Child2();
c1.Output();
c2.Output();
c1.Child_1_Special();
c2.Child_2_Special();
Exit(c1, c2);
}
private static void Exit(Child1 c1, Child2 c2)
{
c1 = null;
c2 = null;
}