Private Sub Button2_Click_1(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button2.Click
        Dim Mp3file As TagLib.File = TagLib.File.Create( _
        ListBoxFileList.SelectedItem)
        Dim artist() As String = {TextBoxArtist.Text}
        Dim Genre() As String = {TextBoxGenre.Text}
 
        Mp3file.Tag.Title = TextBoxTitle.Text
        Mp3file.Tag.AlbumArtists = artist
        Mp3file.Tag.Album = TextBoxAlbum.Text
        Mp3file.Tag.Year = TextBoxYear.Text
        Mp3file.Tag.Genres = Genre
        Mp3file.Save()
        ListBoxFileList.Focus()
    End Sub

    Dim artist As String
    Mp3file.Tag.AlbumArtists(0) = artist 'funktioniert nicht egal welchen index