C#拆分中文和數字字符串

比如要拆分“呵呵呵90909086676喝喝999”，下面當type=0返回的是中文字符串“呵呵呵,喝喝”，type=1返回的是數字字符串“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());
        }