正则表达式之提取中文

         static void Main(string[] args)
         {
            string str = "asd=-.我是中文{asdasd";
            Console.WriteLine(GetChineseWord(str));
            Console.ReadKey();

         }
          public static string GetChineseWord(string oriText)
          {
            string x = @"[u4E00-u9FFF]+";
            MatchCollection Matches = Regex.Matches
            (oriText, x, RegexOptions.IgnoreCase);
            StringBuilder sb = new StringBuilder();
            foreach (Match NextMatch in Matches)
            {
                sb.Append(NextMatch.Value);
            }
            return sb.ToString();
          }    

很简单，不想废话，最终控制台输出的就是“我是中文”这几个字