}
  #endregion
  
  ///
  /// 应用程序的主入口点。
  ///
  [STAThread]
  static void Main()
  {
   Application.Run(new Form1());
  }
  
  private void StartDownload()
  {
   Start.Enabled = false;
   string URL = srcAddress.Text;
   int n = URL.LastIndexOf("?");
   string URLAddress = URL;
   //string URLAddress = URL.Substring(0,n);
   string fileName = URL.Substring(n+1,URL.Length-n-1);
   string Dir = tarAddress.Text;
   string Path = Dir+fileName;
  
   try
   {
    WebRequest myre=WebRequest.Create(URLAddress);
   }
   catch(WebException exp)
   {
    MessageBox.Show(exp.Message,"Error");
   }
  
   try
   {
    statusBar.Text = "开始下载文件...";
    client.DownloadFile(URLAddress,fileName);
    Stream str = client.OpenRead(URLAddress);
    //StreamReader reader = new StreamReader(str); ,这句没有什么必要！个人认为
    byte[] mbyte = new byte[100000];
    int allmybyte = (int)mbyte.Length;
    int startmbyte = 0;
    statusBar.Text = "正在接收数据...";
    //写入到BYTE数组中，起缓冲作用
    while(allmybyte>0)
    {
     int m = str.Read(mbyte,startmbyte,allmybyte);
     if(m==0)
      break;
  
     startmbyte+=m;
     allmybyte-=m;
    }
  
    FileStream fstr = new FileStream(Path,FileMode.OpenOrCreate,FileAccess.Write);
    fstr.Write(mbyte,0,startmbyte);
    str.Close();
    fstr.Close();
  
    statusBar.Text = "下载完毕！";
   }
   catch(WebException exp)
   {
    MessageBox.Show(exp.Message,"Error");
    statusBar.Text = "";
   }
  
   Start.Enabled = true;
  }
  
  
  private void Start_Click(object sender, System.EventArgs e)
  {
   Thread th = new Thread(new ThreadStart(StartDownload));
   th.Start();
  }

   
 }
}