private void exactMatchMenuItem_Click(object sender, RoutedEventArgs e)
        {
            DictionaryWindow emdw = new DictionaryWindow("Exact match dictionary", _exactDictFile);

            emdw.Owner = this;
            emdw.ShowDialog();
        }
        private void partialMatchMenuItem_Click(object sender, RoutedEventArgs e)
        {
            DictionaryWindow pmdw = new DictionaryWindow("Partial match dictionary", _partialDictFile);

            pmdw.Owner = this;
            pmdw.ShowDialog();
        }