中文轉Unicode:HttpUtility.UrlEncodeUnicode(string str);
轉換后中文格式:"%uxxxx" 舉例:"柳_abc123" 轉換結果是:"%u67f3_abc123"
Unicode轉中文1:HttpUtility.UrlDecode(string str);
str格式:"%uxxxx" ,舉例:"%u67f3_abc123"
Unicode轉中文2:Regex.Unescape(string str);
str格式:"sdfasdf\uxxxx" ,舉例:"sdfasdf(\uxxxx對應的中文)"