求大神，为什麽出现subscript out of range

Question

moer = Array.CreateInstance(typeof(double), 5);

        if (yhsjxz.Rows[0]["cygsyxs"] != "")
        {
            double gsyxs = double.Parse(yhsjxz.Rows[0]["cygsyxs"].ToString());
            moer.SetValue(gsyxs, 0);
        }
        moer.SetValue(1, 1);
        fzqzl1 = double.Parse(yhsjxz.Rows[0]["fzqzl"].ToString()) * 9.8;
        moer.SetValue(fzqzl1, 2);

为什麽会出现subscript out of range