中文转Unicode:HttpUtility.UrlEncodeUnicode(string str);
转换后中文格式:"%uxxxx" 举例:"柳_abc123" 转换结果是:"%u67f3_abc123"
Unicode转中文1:HttpUtility.UrlDecode(string str);
str格式:"%uxxxx" ,举例:"%u67f3_abc123"
Unicode转中文2:Regex.Unescape(string str);
str格式:"uxxxx" ,举例:"u67f3_abc123"
参考:http://www.yongfa365.com/Item/Unicode-Chinese-UrlEncodeUnicode-Unescape.html