Uploading file to FTP server Error: file is corrupted

this is the change i made in code and it works now, stream reader was creating problem

//FTP Server URL.
        string ftp = "ftp:/ your ftp";

        //FTP Folder name. Leave blank if you want to upload to root folder.
        string ftpFolder = "ftp folder/";

        byte[] fileBytes = null;

        //Read the FileName and convert it to Byte array.
        string fileName = Path.GetFileName(FileUpload1.FileName);


        FileUpload1.PostedFile.InputStream.Seek(0, SeekOrigin.Begin);
        using (var binaryReader = new BinaryReader(FileUpload1.PostedFile.InputStream))
        {
            fileBytes = binaryReader.ReadBytes(FileUpload1.PostedFile.ContentLength);
        }



        try
        {
            //Create FTP Request.
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftp + ftpFolder + fileName);
            request.Method = WebRequestMethods.Ftp.UploadFile;

            //Enter FTP Server credentials.
            request.Credentials = new NetworkCredential("username", "password");
            request.ContentLength = fileBytes.Length;
            request.UsePassive = true;
            request.UseBinary = true;
            request.ServicePoint.ConnectionLimit = fileBytes.Length;
            request.EnableSsl = false;

            using (Stream requestStream = request.GetRequestStream())
            {
                requestStream.Write(fileBytes, 0, fileBytes.Length);
                requestStream.Close();
            }

            FtpWebResponse response = (FtpWebResponse)request.GetResponse();

            lblMessage.Text += fileName + " uploaded.<br />";
            response.Close();
        }
        catch (WebException ex)
        {
            throw new Exception((ex.Response as FtpWebResponse).StatusDescription);
        }