public async Task <ActionResult> Upload(IFormFile file, string RiskId, string documentName)
        {
            try
            {
                if (file.Length > 0)
                {
                    string[] detectFileName = file.FileName.Split('\\');
                    //remove space on filename or special characters
                    string fileNameOnly     = detectFileName[detectFileName.Length - 1].Replace(" ", "");
                    string originalFileName = fileNameOnly;
                    #region clear file name for any special characters
                    fileNameOnly = fileNameOnly.Replace("'", "");
                    fileNameOnly = fileNameOnly.Replace("-", "");
                    fileNameOnly = fileNameOnly.Replace("_", "");
                    fileNameOnly = fileNameOnly.Replace("$", "");
                    fileNameOnly = fileNameOnly.Replace("%", "");
                    fileNameOnly = fileNameOnly.Replace("@", "");
                    fileNameOnly = fileNameOnly.Replace("*", "");
                    fileNameOnly = fileNameOnly.Replace("#", "");
                    #endregion

                    Guid ramdomId = Guid.NewGuid();
                    fileNameOnly = RiskId + "_" + ramdomId + "_" + fileNameOnly;
                    string remoteDirectory = "/document/" + fileNameOnly;

                    using (FtpClient client = new FtpClient())
                    {
                        client.Host        = "fraweb.iweb-storage.com";
                        client.Port        = 21;
                        client.Credentials = new NetworkCredential("fraweb-admin", "P@$$word123");

                        client.UploadFile(file.FileName, remoteDirectory);
                        client.RetryAttempts = 1;
                        client.UploadFile(file.FileName, remoteDirectory, FtpExists.Overwrite, false, FtpVerify.Retry);

                        client.Disconnect();
                    }

                    Document fileDocument = new Document
                    {
                        RiskAssessmentID = RiskId,
                        DocumentName     = documentName,
                        FileName         = originalFileName,
                        FTPLink          = remoteDirectory,
                        DocumentGUID     = ramdomId.ToString()
                    };
                    await _documentRepository.AddToDocumentAsync(fileDocument);
                }
            }
            catch (Exception exception)
            {
                return(Json(new
                {
                    success = false,
                    response = exception.Message
                }));
            }

            return(Ok());
        }