private static Action myDelegate()
    {
        int c = 0;
        return delegate
        {
            c++;
            Console.WriteLine(c);
        };
    }

    private static void Main(string[] args)
    {
        Action p = myDelegate();
        p();
        p();
        p();
        Console.Read();
    }

这段代码打印1 2 3，这是C#中闭包