Class to return file path after uploading to FTP folder in ASP.Net

hello,

i have this file uplaod code which works fine on page behind i want to make the class file of this code so i can just call method on page behind and pass parameter how can i do it please advice

string uploadFileName = "";
        string uploadFilePath = "";
        if (FileUpload1.HasFile)
        {
            string ext = Path.GetExtension(FileUpload1.FileName).ToLower();
            if (ext == ".jpg" || ext == ".jpeg" || ext == ".gif" || ext == ".png")
            {
                uploadFileName = Guid.NewGuid().ToString() + ext;
            }
            //FTP Server URL.
            string ftp = "ftp://onlinehcs.com/";

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

            byte[] fileBytes = null;

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


            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();


              return path so it can bind with image on page  = "domainname/Dynamicimage/" + uploadFileName;
               
                response.Close();
            }
            catch (WebException ex)
            {
                throw new Exception((ex.Response as FtpWebResponse).StatusDescription);
            }
        }