问来自C# streams的Twitch API调用/跟随

EN

    public partial class Form1 : Form
{
    const string chName = "ryetta";
    const string FollowsURL = "https://api.twitch.tv/kraken/users/" + chName + "/follows/channels?limit=200&sortby=last_broadcast";
    const string oauth = "4yk...";
    const string FollowedURL = "https://api.twitch.tv/kraken/streams/followed?oauth_token=" + oauth + "&stream_type=live";

    BindingList<ChannelData> channels = new BindingList<ChannelData>();
    WebClient wc;
    string selectedChannelName;

    public Form1()
    {
        InitializeComponent();

        wc = new WebClient();

    }

    private void button1_Click(object sender, EventArgs e)
    {
        string s = jsonget(FollowedURL); // this is where i get the scope error so the other parts of the code is irrelevant
        //JObject jObj = JObject.Parse(s);

        StreamFollowed streams1 = JsonConvert.DeserializeObject<StreamFollowed>(s);
        channels.Clear();
        foreach (Stream stream in streams1.streams)
        {
            System.IO.Stream str = wc.OpenRead(stream.preview.medium);
            Bitmap bmp = new Bitmap(str);
            channels.Add(new ChannelData(stream, bmp));


        }

        dataGridView1.DataSource = channels.Select(cdata => new {
            cdata.Name,
            cdata.ViewerCount,
            cdata.Game,
            cdata.Title,
            cdata.UpTimeString,
            cdata.BmpPreview,
            cdata.followersCount,
            cdata.ratio}).ToList();

        selectedChannelName = (string)dataGridView1.SelectedRows[0].Cells[0].Value;


    }
        public string jsonget(string url)
    {
        return wc.DownloadString(url);   
    }