static void Main(string[] args)
{
Dog p = new Poodle();
p.Name = "푸들이";
p.jitda();
((Poodle)p).work();
(p as Poodle).work();
behave(p);
Dog j = new Jindo();
j.Name = "진도이";
j.jitda();
((Jindo)j).run();
behave(j);
}
void Operate()
{
var dog = new Poodle();
dog.HasSpoken += dog_HasSpoken;
}