.NET读取所有目录下文件正则匹配文本

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;

namespace Test
{
    class FiEmail
    {
        public static void Main(string[] args) {
            Console.WriteLine("请输入内容路径:");
            
            string[] fs=Directory.GetFiles(args[0]);
            if(fs!=null){
                string jobsPattern=@"([\w-]+(\.\w+)*@([\w-]+\.)+\w{2,3})";
                Regex rx = new Regex(jobsPattern,RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Multiline );

                foreach(string s in fs){
                    Console.WriteLine("匹配");
                    string asR=File.ReadAllText(s);
                    MatchCollection matches = rx.Matches(asR);
                    if(matches!=null && matches.Count>0) {
                        string argsP="";
                        for(int loopI=0;loopI<matches.Count;loopI++){
                            argsP+=(matches[loopI].Groups[0].Value)+Environment.NewLine ;
                        }
                        W(argsP.Trim(new char[]{'\n'}));
                    }
                    Console.WriteLine(s);
                }
            }
            Console.ReadLine();
        }
        public static void W(string ids){

            string paths=System.IO.Path.Combine(@"C:\Documents and Settings\Administrator\桌面\GC\","edel.txt");
            using (System.IO.StreamWriter  sr = new System.IO.StreamWriter(paths,true)){
               sr.WriteLine(ids);
            }
        }
    }
}