How to use WebClient() to foreach all results from json?

Question

I am generation json which show something like this (var json): ["C:\Users\Admin\Desktop\222.mp3","C:\Users\Admin\Desktop\TGD.mp3"]

How can I parse it with "foreach"? I want to use everysingle link in my app.

    private void Button_Click_7(object sender, RoutedEventArgs e)
    {
        // Eksport
        SaveFileDialog saveFileDialog = new SaveFileDialog();
        saveFileDialog.Filter = "Json (*.json)|*.json";
        if (saveFileDialog.ShowDialog() == true)
        {
            string strResultJson = JsonConvert.SerializeObject(MusicList);
            File.WriteAllText(saveFileDialog.FileName, strResultJson);
            MessageBox.Show("Twoja playlista została zapisana!");
        }
    }

    private void Button_Click_8(object sender, RoutedEventArgs e)
    {
        // Import
        OpenFileDialog fileDialog = new OpenFileDialog
        {
            Multiselect = false,
            DefaultExt = ".json"
        };
        bool? dialogOk = fileDialog.ShowDialog();
        if (dialogOk == true)
        {
            string linkToPlaylist;
            linkToPlaylist = fileDialog.FileName;

            var json = new WebClient().DownloadString(linkToPlaylist);

            // What's now?

            MessageBox.Show(json.ToString());
        }
    }