易车面试题

1、装箱拆箱

static void Main(string[] arg)
        {
            int i = 2000;
            object a = i;
            i = 2001;
            int j = (int)a;
            Console.WriteLine("i={0},a={1},j={2}", i, a, j);
            Console.ReadKey();
        }

2001,2000,2000

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