public async void addThuChiThang()
 {
     ctdlAddThuChiThang ctdl = new ctdlAddThuChiThang();
     ContentDialogResult rs = await ctdl.ShowAsync();
     if (rs == ContentDialogResult.Primary)
     {
         listViewThuChiThang.ItemsSource = QuanLyThuChi.getAllThuChiThang();
     }
 }
 private async void btnAddThuChiThang_Click(object sender, RoutedEventArgs e)
 {
     ctdlAddThuChiThang ctdl = new ctdlAddThuChiThang();
     ContentDialogResult rs = await ctdl.ShowAsync();
     if (rs == ContentDialogResult.Primary)
     {
         listViewThuChiThang.ItemsSource = QuanLyThuChi.getAllThuChiThang();
     }
 }