C#拆分中文和数字字符串

比如要拆分“呵呵呵90909086676喝喝999”，下面当type=0返回的是中文字符串“呵呵呵,喝喝”，type=1返回的是数字字符串“90909086676,999”，

private string GetStrings(string str,int type=0)        {            IList<string> strList = new List<string>();            MatchCollection ms;            if (type == 0)            {                ms = Regex.Matches(str, @"\D+");             }            else            {                ms = Regex.Matches(str, @"\d+");            }                      foreach (Match m in ms)            {                strList.Add(m.Value);            }            return string.Join("",strList.ToArray());        }