using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string address="台中市西屯區台灣大道四段1727號";

​

        Regex regexWithoutSection = new Regex(@"(大道|路|街|巷|弄|衖)(.*?)(號)");    

        Match matchWithoutSection = regexWithoutSection.Match(address);

        if (matchWithoutSection.Success)

        {

            Regex regexWithSection = new Regex(@"(段)(.*?)(號)");

            Match matchWithSection = regexWithSection.Match(address);

            if (matchWithSection.Success)

            {

                Console.WriteLine("替換後的地址: " + regexWithSection.Replace(address, "$1**$3"));

            }

            else

            {           

                Console.WriteLine("替換後的地址: " + regexWithoutSection.Replace(address, "$1**$3"));

            }

        }

​

        else

        {

            Console.WriteLine("找不到匹配的內容。");

        }

    }

}