public void FindDuplicates(object sender, RoutedEventArgs e)
 {
     try
     {
         if (_mainViewModel.LogList != null)
         {
             string message = _mainViewModel.FindDuplicates();
             MessageBox.Show(message, "Duplikate");
         }
         else
         {
             MessageBox.Show("Laden Sie zuerst die Daten.", "Daten laden");
         }
     }
     catch (Exception ex)
     {
         MessageBox.Show("Exception occured: " + ex.Message, "Exception occured");
     }
 }