private void dateBox_SelectedIndexChanged(object sender, EventArgs e) { this.hourBox.Text = "Select time"; this.hourBox.Items.Clear(); var date = this.dateBox.SelectedItem.ToString(); var hours = screeningService.GetHoursForMoviesByDate(this._townName, this._cinemaName, this._movieName, date); ; this.hourBox.Items.AddRange(hours); }