正则获得所有括号内的信息

   Regex regex = new Regex(@"(?<=\()[^()]+(?=\))");
  string forContent=@"(
(DS_NE_CELL_G.BTS_NAME)-(DS_PRD_A_CELL_H.FREECOUNT)
)
/
(
(DS_NE_CELL_G.BTS_NAME)+(DS_PRD_A_CELL_H.FREECOUNT)
) >2
";
    MatchCollection mm = regex.Matches(forContent);
  int k = 1;
   foreach (Match m in mm)
                {
                    k++;
                    forContent = forContent.Replace(m.Value, k.ToString());
                }