private void cinemaComboBox_SelectedIndexChanged(object sender, EventArgs e) { this.dateBox.Text = "Select date"; this.dateBox.Items.Clear(); this._cinemaName = this.cinemaComboBox.SelectedItem.ToString(); var dates = screeningService.GetAllDatesForMovieInCinema(this._townName, this._cinemaName, this._movieName); this.dateBox.Items.AddRange(dates); }