private void ConfigFiltersButtonClick(object sender, EventArgs e)
        {
            IFilterable filterable = (IFilterable)ConfigurationTreeView.SelectedNode.Tag;
            Form        form       = new FilterForm(filterable, _knownTypes);

            form.ShowDialog();
        }
 private void ConfigFiltersButtonClick(object sender, EventArgs e)
 {
     IFilterable filterable = (IFilterable) ConfigurationTreeView.SelectedNode.Tag;
     Form form = new FilterForm(filterable, _knownTypes);
     form.ShowDialog();
 }