用正则类如何替换查找出来的字符?
那个属性是只读的无法替换?
------解决方案--------------------用委托   
 string test =  "aaaa{=1=}dddd{=0=}cccc{=31=} "; 
 string result = Regex.Replace(test, @ "\{=(\d+)=\} ", new MatchEvaluator(regReplace));     
 private string regReplace(Match m) 
 { 
     switch (m.Groups[1].Value) 
     { 
         case  "1 ": 
             return  "abc "; 
         case  "0 ": 
             return  "ccc "; 
     } 
     return  " "; 
 }
------解决方案--------------------private void button1_Click(object sender, EventArgs e) 
         { 
             string s =  "1 12 3 5 "; 
             s = Regex.Replace(s, @ "\d+ ", new MatchEvaluator(CorrectString), RegexOptions.Compiled | RegexOptions.IgnoreCase); 
             txtView.Text = s; 
         }   
         private static string CorrectString(Match match) 
         { 
             string matchValue = match.Value; 
             if (matchValue.Length == 1) 
                 matchValue =  "0 " + matchValue; 
             return matchValue; 
         }   
 结果是 01 12 03 05