C # File Download---in File stream format

<summary>///File download///</summary>/<param name= "filename" > file name </param>/        <param name= "FilePath" > Path </param> public void Bigfiledownload (string FileName, String FilePath) {            try {//Download the file as a stream of characters FileStream fs = new FileStream (filepath, FileMode.Open); byte[] bytes = new byte[(int) fs.            Length]; Fs. Read (bytes, 0, bytes.            Length); Fs.            Close ();            Response.ContentType = "application/octet-stream;charset=gb2321"; Notifies the browser to download the file instead of opening it, and encodes the Chinese name Response.AddHeader ("Content-disposition", "attachment";            Filename= "+ httputility.urlencode (FileName, System.Text.Encoding.UTF8));            Response.BinaryWrite (bytes);            Response.Flush ();         Response.End ();            } catch (Exception ex) {} finally {Response.Flush ();         Response.End ();   }    }

C # File Download---in File stream format