java正则表达式C

//Java版本//替换字符串s中的所有字母(这里替换为“”)public static String getNumberInfo(StringBuffer s) {	String ptn = "[a-zA-Z]+";	Pattern p = Pattern.compile(ptn, Pattern.DOTALL);	Matcher m = p.matcher(s);	while (m.find()) {		s = s.replace(m.start(0), m.end(0), "");		m = p.matcher(s);	}	return s;}//C# 版本public Form1(){	InitializeComponent();	StringBuilder s = new StringBuilder(@"haohao,9.36,ssf,123, good ,421f,ffd,fz,5.26,,,asfggds,13123");	Test2(s);}private void Test2(StringBuilder s){	String ptn = "[a-zA-Z]+";	MatchCollection matchCol = Regex.Matches(s.ToString(), ptn, RegexOptions.Multiline);	for (int i = matchCol.Count - 1; i >= 0; i--)	{		Match item = matchCol[i];		s.Remove(item.Index, item.Length);	}       	txtScan.AppendText(string.Format("结果：{0}\r\n", s.ToString()));}