正则表达式 - 双引号内字符转星号/单词首字母转大写

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Text.RegularExpressions;//引用namespace WindowsFormsApplication1{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void btnChange_Click(object sender, EventArgs e)        {            //首字母大写            //rtbResult.Text = Regex.Replace(rtbSource.Text, @"\w+", new MatchEvaluator(CapText));            //双引号内其他字符转星号            rtbResult.Text = Regex.Replace(rtbSource.Text, "\"[^\"]*\"", new MatchEvaluator(XingHao));        }        //将单词的首字母转为大写（注：此处引用自 http://msdn.microsoft.com/zh-cn/library/cft8645c(v=vs.80).aspx）        //如：【may i help you】 转为：【May I Help You】        static string CapText(Match m)        {            // Get the matched string.            string x = m.ToString();            // If the first char is lower case...            if (char.IsLower(x[0]))            {                // Capitalize it.                return char.ToUpper(x[0]) + x.Substring(1, x.Length - 1);            }            return x;        }        //将双引号中的字符转为星号*         //如：【"what" can "i" do for you"】 转为：【"****" can "*" do for you"】        static string XingHao(Match m)   //本人仍觉此算法略显粗糙，有较好算法者望指教一二        {            StringBuilder strBld = new StringBuilder();            string x = m.ToString();            for (int i = 0; i < x.Length - 2;i++ )            {                strBld.Append("*");            }                        return x.Substring(0,1) + strBld.ToString() + x.Substring(x.Length-1);        }    }}