Downloading file from ftp server removes new line and show all line in single line

public void DownloadFTPFile()
        {

            string host = ConfigurationManager.AppSettings.Get("ftphost");
            string username = ConfigurationManager.AppSettings.Get("ftpusername");
            string password = ConfigurationManager.AppSettings.Get("ftppassword");

            string fileName = "Receipt.txt";
            try
            {
                string fullPath = host + "/FROM-SAP-2-MOB/" + fileName;
                //Create FTP Request.
                FtpWebRequest request = (FtpWebRequest)WebRequest.Create(fullPath);
                request.Method = WebRequestMethods.Ftp.DownloadFile;
                //Enter FTP Server credentials.
                request.Credentials = new NetworkCredential(username, password);
                request.UsePassive = true;
                request.UseBinary = true;
                request.EnableSsl = false;
                //Fetch the Response and read it into a MemoryStream object.
                FtpWebResponse response = (FtpWebResponse)request.GetResponse();
                using (Stream responseStream = response.GetResponseStream())
                {
                    using (Stream fileStream = new FileStream(Application.StartupPath.ToString() + "\\IMPORT_CSV\\" + fileName, FileMode.CreateNew))
                    {
                        responseStream.CopyTo(fileStream);
                    }
                }
            }
            catch (WebException ex)
            {
                throw new Exception((ex.Response as FtpWebResponse).StatusDescription);
            }
        }