C#使用正则表达式实现首字母转大写的方法

class Program{ static void Main(string[] args) {  // Input strings.  const string s1 = "samuel allen";  const string s2 = "dot net perls";  const string s3 = "Uppercase first letters of all words in the string.";  // Write output strings.  Console.WriteLine(TextTools.UpperFirst(s1));  Console.WriteLine(TextTools.UpperFirst(s2));  Console.WriteLine(TextTools.UpperFirst(s3));  Console.ReadKey(); } } public static class TextTools { /// <summary> /// Uppercase first letters of all words in the string. /// </summary> public static string UpperFirst(string s) {  return Regex.Replace(s, @"/b[a-z]/w+", delegate(Match match)  {  string v = match.ToString();  return char.ToUpper(v[0]) + v.Substring(1);  }); }}