private async void Button_Click_1(object sender, RoutedEventArgs e) { SpellingWordList myList = new SpellingWordList(); SpellingWord myWord = new SpellingWord(); myWord.SpellWord = tbSpellingWord.Text; myWord.UsageSentance = tbUsageSentance.Text; myList.AddWord(myWord); tbResult.Text = await myList.SaveAs(tbWhatToSave.Text); }