int HARD_KEY = Convert.ToInt32("37", 16);
        private string Encrypt(string sValue, string sKey)
        {
            string sTempValue = sValue;
            string sTempKey = sKey.Trim();
            string sRValue = "";
            int sChar = 0;
            for (int x = 1; x < sTempValue.Length; x++)
            {
                sChar = Convert.ToInt32(sTempValue.Substring(x, 1));
                for (int y = 1; y < sTempKey.Length; y++)
                {
                    int asc = Convert.ToInt32(sTempValue.Substring(y, 1));
                    sChar = asc | HARD_KEY;
                }
                sRValue = sRValue + Convert.ToChar(sChar).ToString();
            }
            listBox3.Items.Add(sRValue);
            return sRValue;
        }

------解决方案--------------------
循环x，y从0开始不行吗？

------解决方案--------------------
初步估计是这样子的，另外HARD_KEY的数据类型是啥
C# code

    private string Encrypt(string sValue, string sKey)
    {
        //Dim intLen

        string sRValue = string.Empty;
        char sChar;
        //sChar = 0
        string sTempValue = sValue;
        string sTempKey = sKey.Trim();

        foreach (char x in sTempValue)
        {
            sChar = x;
            foreach (char y in sTempKey)
            {
                int asc = Convert.ToInt32(y);
                sChar = (char)asc | HARD_KEY;
            }
            sRValue = sRValue + sChar.ToString();
        }
        listBox3.Items.Add(sRValue);
        return sRValue;
    }