在内部/本地/匿名类方面,Java和C#之间的根本区别是什么？

Runnable r = new Runnable() {
    public void run() {
        System.out.println("Hello, world!");
    }
};

Action a = delegate() {
    Console.WriteLine("Hello, world!");
};

List<Runnable> runnables = new ArrayList<>();
runnables.add(new Runnable() {
    public void run() {
        System.out.println("Hello, world!");
    }
});

List<Action> actions = new List<Action>();
actions.Add(delegate() {
    Console.WriteLine("Hello, world!");
});

Runnable r = new Runnable() {
    public void run() {
        System.out.println("Hello, world!");
    }
};

Action a = delegate() {
    Console.WriteLine("Hello, world!");
};