string s = "dsafdfgasd||455565";            string reg = "||";             string[] str = Regex.Split(s, reg, RegexOptions.IgnoreCase);            foreach (string i in str)                Response.Write(i.ToString());為什么這樣的結果相當于沒有分割。而string s = "dsafdfgasd||455565";            string reg = "ga";             string[] str = Regex.Split(s, reg, RegexOptions.IgnoreCase);            foreach (string i in str)                Response.Write(i.ToString());可以分割成兩個字符串呢，求正解！小弟感激不盡