static public void Modify_Execute(object parameter)
        {
            var newWin = new PlaylistWindow();

            newWin.ShowDialog();
            if (newWin.bHasReturned == true)
            {
#warning Doit ouvrir la fenetre "modifierPlaylist"
            }
        }
        static public void Delete_Execute(object parameter)
        {
            var newWin = new PlaylistWindow();

            newWin.ShowDialog();
            if (newWin.bHasReturned == true)
            {
                File.Delete(newWin.playlist.Path);
            }
        }
        static public void Add_Execute(object parameter)
        {
            ViewModelPlayer context = parameter as ViewModelPlayer;
            var             newWin  = new PlaylistWindow();

            newWin.ShowDialog();
            if (newWin.bHasReturned == true)
            {
                string path = context._media.Source.ToString();
                newWin.playlist.AddToPlaylist(path, false);
            }
        }
        static public void Open_Execute(object parameter)
        {
            ViewModelPlayer context = parameter as ViewModelPlayer;
            var             newWin  = new PlaylistWindow();

            newWin.ShowDialog();
            if (newWin.bHasReturned == true)
            {
                context._playlist = newWin.playlist;
                if (context._playlist.Empty() == false)
                {
                    context._media.Source = new Uri(context._playlist.Files[0].Path);
                }
                context._media.Play();
            }
        }