private void researchSetDelete_Click(object sender, RoutedEventArgs e)
{
capital_city_research_set set = researchSetList.SelectedItem as capital_city_research_set;
if (set == null)
{
return;
}
int id = set.ID;
WorldWorker.DeleteResearchSet(id);
LegacyToolBox.Data.ResearchSet.Remove(set);
LegacyToolBox.AppendMessage("Research Set " + id + " Deleted.");
}