/// <summary>
/// Entfernen einer Playlist
/// </summary>
/// <param name="p"></param>
static public void Remove(PlaylistClass p)
{
pll.Remove(p);
}
/// <summary>
/// Hinzufügen einer Playlist
/// </summary>
/// <param name="p"></param>
static public void Add(PlaylistClass p)
{
pll.Add(p);
}