protected virtual bool DisplayAddNewDevicesToBackupMessageCore()
        {
            DialogResult res = DialogResult.Yes;

            while (true)
            {
                res = ShowDialog(
                    StorageManagerDialogAction.DisplayAddNewDevicesToBackupMessage,
                    "All specified backup media are full. Please add new backup media.",
                    MessageBoxButtons.YesNoCancel,
                    MessageBoxIcon.Question);
                AddAction(new StorageManagerDialogActionInfo()
                {
                    Action = StorageManagerDialogAction.DisplayAddNewDevicesToBackupMessage, DialogResult = res
                });
                if (res != DialogResult.Yes)
                {
                    return(false);
                }
                Manager.SaveBackupState();
                ShowStorageForm();
                if (Manager.BackupStateChanged())
                {
                    break;
                }
            }
            return(true);
        }