private async void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e) { int it = ((ListBox)sender).SelectedIndex; PreviewControl.Change_Item(it); Color c = await Get_Color(); _R.Text = c.R.ToString(); _G.Text = c.G.ToString(); _B.Text = c.B.ToString(); try { _RSlider.Value = double.Parse(c.R.ToString()); _GSlider.Value = double.Parse(c.G.ToString()); _BSlider.Value = double.Parse(c.B.ToString()); } catch (Exception ex) { MessageDialog msg = new MessageDialog(ex.Message.ToString(), ex.HResult.ToString()); await msg.ShowAsync(); System.Diagnostics.Debug.WriteLine(ex.Message); } Update_Hex(c); PreviewControl.Update_ColorOnPreview(-1, await Generate_BandTheme()); }