Windows Phone Hackathon : Facebook & Instagram Sample - Facebook Page Code - Get Access Token

gistfile1.cs

public FacebookSample()
{
    InitializeComponent();
    // Get Access Token
    GetAccessTokenAsync();
}

private void GetAccessTokenAsync()
{
    string url = string.Format(
        @"https://graph.facebook.com/oauth/access_token?" +
        @"client_id={0}&client_secret={1}&grant_type=client_credentials",
            appid,
            appsecret
        );

    Uri accessTokenUri = new Uri(url);

    WebClient webclient = new WebClient();
    webclient.DownloadStringCompleted += 
        new DownloadStringCompletedEventHandler(webclient_GetAccessTokenCompleted);
    webclient.DownloadStringAsync(accessTokenUri);
}

private void webclient_GetAccessTokenCompleted
	(object sender, DownloadStringCompletedEventArgs e)
{
	accessToken = e.Result.Replace("access_token=", "");
	Button_Go.IsEnabled = true;
}