private void addConcertBtn_Click(object sender, EventArgs e) { List <AvailableArtistsView> availableArtists = AdminEngine.GetAvailableArtists(); List <AvailableScenesView> availableScenes = AdminEngine.GetAvailableScenes(); AddConcert addConcertForm = new AddConcert(availableArtists, availableScenes); addConcertForm.Show(); this.Hide(); }