正则表达式 每个单词首字母大写

using System.Text.RegularExpressions;

class RegExSample 
{
   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;
   }
    
   static void Main() 
   {
      string text = "four score and seven years ago";
      System.Console.WriteLine("text=[" + text + "]");
      string result = Regex.Replace(text, @"\w+",
         new MatchEvaluator(RegExSample.CapText));
      System.Console.WriteLine("result=[" + result + "]");
   }
}