private void Button_Click(object sender, RoutedEventArgs e) { this.list = new List <TweetInfo>(); TwitterViewModel viewmodel = new TwitterViewModel(); list = viewmodel.Get(textbox.Text); List <KeyValuePair <string, string> > temp = new List <KeyValuePair <string, string> >(); foreach (var item in list) { temp.Add(new KeyValuePair <string, string>(item.Username, item.Tweet)); } listbox.ItemsSource = temp; }