C#,使用正则表达式查找和替换单词中的某些字符？

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        string input = "Hello, world! This is a sample sentence.";

        // 使用正则表达式查找包含特定字符的单词
        string pattern = @"\b\w*[aeiou]\w*\b";
        MatchCollection matches = Regex.Matches(input, pattern);

        // 输出匹配到的单词
        foreach (Match match in matches)
        {
            Console.WriteLine(match.Value);
        }

        // 使用正则表达式替换单词中的某些字符
        string replacePattern = @"[aeiou]";
        string replaced = Regex.Replace(input, replacePattern, "*");

        Console.WriteLine(replaced);
    }
}