private void OnAddClicked(object sender, RoutedEventArgs e)
        {
            var fileDialogObject = new Microsoft.Win32.OpenFileDialog();
            var fileName         = fileDialogObject.BrowseFileToOpen("Score Files|*.sco");

            if (fileName != "")
            {
                if (FileListBox.Items.Count == 0)
                {
                    _previousScoreFileDetailsObj = null;
                }

                _currentScoreFileDetailsObj = new ScoreFileDetails();
                ViewScores.FileName         = fileName;

                if (ValidateScoreFiles())
                {
                    _previousScoreFileDetailsObj = _currentScoreFileDetailsObj;
                    _scoreFileDetailsList.Add(_currentScoreFileDetailsObj);
                    FileListBox.Items.Add(fileName);
                }
                else
                {
                    MessageBox.Show("This file can't be merged!!!! as there is a mismatch in one of the following \t\n 1.Session Name \t\n 2.Scale Name \t\n 3.Trials", "Info",
                                    MessageBoxButton.OK, MessageBoxImage.Exclamation);
                }
            }
        }