private void buttonSeePerfomances_Click(object sender, EventArgs e) { ISongsRepository songsRep = new SongsRepository(); List <PerformedSongModel> songs = songsRep.GetAllPSongs().ToList(); listPerfomances.Items.Clear(); foreach (PerformedSongModel song in songs) { string toList = "Performance id:" + song.PerformanceId + ", Song name:" + song.SongName + ", Circumstances of perfomance:" + song.CircumstancesOfPerfomance + ", Author id:" + song.AuthorId; listPerfomances.Items.Add(toList); } }