C#正则表达式示例3

using System;
using System.Text.RegularExpressions;

namespace RegExApplication {

   class Program {

      static void Main(string[] args) {
         string input = "Hello   World   ";
         string pattern = "/s+";
         string replacement = " ";
         Regex rgx = new Regex(pattern);
         string result = rgx.Replace(input, replacement);

         Console.WriteLine("Original String: {0}", input);
         Console.WriteLine("Replacement String: {0}", result);    
         Console.ReadKey();
      }
   }
}