Einfachste Weg, um post zu einer facebook fan-Seite Wand mit C#!

Ich bin dieses posting, weil der Mangel an guten Informationen im internet, dazu geführt, dass ich mehr Zeit als ich brauchte. Ich hoffe, die anderen profitieren. Der Schlüssel ist das hinzufügen von &scope=manage_pages,offline_access,publish_stream, um die url.

class Program
{
    private const string FacebookApiId = "apiId";
    private const string FacebookApiSecret = "secret";

    private const string AuthenticationUrlFormat =
        "https://graph.facebook.com/oauth/access_token?client_id={0}&client_secret={1}&grant_type=client_credentials&scope=manage_pages,offline_access,publish_stream";

    static void Main(string[] args)
    {
        string accessToken = GetAccessToken(FacebookApiId, FacebookApiSecret);

        PostMessage(accessToken, "My message");
    }

    static string GetAccessToken(string apiId, string apiSecret)
    {
        string accessToken = string.Empty;
        string url = string.Format(AuthenticationUrlFormat, apiId, apiSecret);

        WebRequest request = WebRequest.Create(url);
        WebResponse response = request.GetResponse();

        using (Stream responseStream = response.GetResponseStream())
        {
            StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
            String responseString = reader.ReadToEnd();

            NameValueCollection query = HttpUtility.ParseQueryString(responseString);

            accessToken = query["access_token"];
        }

        if (accessToken.Trim().Length == 0)
            throw new Exception("There is no Access Token");

        return accessToken;
    }

    static void PostMessage(string accessToken, string message)
    {
        try
        {
            FacebookClient facebookClient = new FacebookClient(accessToken);

            dynamic messagePost = new ExpandoObject();
            messagePost.access_token = accessToken;
            //messagePost.picture = "[A_PICTURE]";
            //messagePost.link = "[SOME_LINK]";
            //messagePost.name = "[SOME_NAME]";
            //messagePost.caption = "my caption"; 
            messagePost.message = message;,
            //messagePost.description = "my description";

            var result = facebookClient.Post("/[user id]/feed", messagePost);
        }
        catch (FacebookOAuthException ex)
        {
             //handle something
        }
        catch (Exception ex)
        {
             //handle something else
        }

    }


}