删除/替换streamreader字符串中的多个单词

using System;
using System.IO;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        // 读取源文件中的字符串
        using (StreamReader reader = new StreamReader("source.txt"))
        {
            string input = reader.ReadToEnd();

            // 删除或替换指定单词
            string replaced = RemoveWords(input, "word1", "word2", "word3");

            // 将修改后的字符串写入目标文件
            using (StreamWriter writer = new StreamWriter("target.txt"))
            {
                writer.Write(replaced);
            }
        }
    }

    static string RemoveWords(string input, params string[] words)
    {
        foreach (string word in words)
        {
            // 使用正则表达式替换指定单词为空字符串
            input = Regex.Replace(input, @"\b" + word + @"\b", "", RegexOptions.IgnoreCase);
        }
        
        return input;
    }
}