Utility Process Button Click

FileProcessing.cs

private void btnProcess_Click(object sender, EventArgs e)
{
    ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(ValidateRemoteCertificate);
    string result = "#Processing...";
    using (RestService rs = new RestService(txtAcumaticaURL.Text, txtEndPoint.Text))
    {
        //Log in to Acumatica ERP
        string logonStatus = rs.Login(txtUsername.Text, txtPswrd.Text, txtCompany.Text, null);

        if (logonStatus == "OK")
        {
            try
            {
                 string[] fileEntries = Directory.GetFiles(txtFolderLocation.Text);

                 foreach (string file in fileEntries) 
                 {
                     FileInfo fi = new FileInfo(file);

                     string id = FileProcessor.ProcessDocument(rs, fi.FullName, fi.Name, Convert.ToDecimal(fi.Length / 1000), "Open", fi.DirectoryName, txtUsername.Text);
                     FileProcessor.AddFilesToTransaction(rs, id, fi.FullName,fi.Name, "DataFile");
                        
                 }
              }
              catch (Exception error)
              {
                   result = "#" + error.Message;
              }
              finally
              {
                   rs.Logout();
              }
          }
          else
          {
              rs.Logout();
              MessageBox.Show("Authorisation with the Acumatica EndPoints could not be establised, please try again.", "Logon Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
           }
     }
}