使用HttpWebRequest抓取檔案

using System;
using System.IO;
using System.Net;

namespace test
{
  class Program
  {
    static void Main(string[] args)
    {
      try
      {
        string url = "http://192.168.1.1/test.txt";
        HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(url);
        Request.Timeout = 5;
        HttpWebResponse Response = (HttpWebResponse)Request.GetResponse();
           
        Stream dataStream = Response.GetResponseStream();
        byte[] buffer = new byte[8192];
                    
        FileStream fs = new FileStream("C:\\test.txt",FileMode.Create,FileAccess.Write);
        int size = 0;
        do
        {
          size = dataStream.Read(buffer, 0, buffer.Length);
          if (size > 0)
            fs.Write(buffer, 0, size);
        } while (size > 0);
        fs.Close();
            
        Response.Close();
        Console.WriteLine("Get File Done!!\n");
        Console.ReadKey();
      }
      catch(WebException ex)
      {
        Console.WriteLine("Get Nothing!!\n");
        Console.ReadKey();
      }
    }
  }
}