Post status,image and video to facebok userwall and facebook page

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            string app_id = "";
            string app_secret = "";
            string scope = "publish_stream,manage_pages";

            if (Request["code"] == null)
            {
                Response.Redirect(string.Format(
                    "https://graph.facebook.com/oauth/authorize?client_id={0}&redirect_uri={1}&scope={2}",
                    app_id, Request.Url.AbsoluteUri, scope));
            }
            else
            {
                Dictionary<string, string> tokens = new Dictionary<string, string>();

                string url = string.Format("https://graph.facebook.com/oauth/access_token?client_id={0}&redirect_uri={1}&scope={2}&code={3}&client_secret={4}",
                    app_id, Request.Url.AbsoluteUri, scope, Request["code"].ToString(), app_secret);

                HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

                using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
                {
                    StreamReader reader = new StreamReader(response.GetResponseStream());

                    string vals = reader.ReadToEnd();

                    foreach (string token in vals.Split('&'))
                    {
                        //meh.aspx?token1=steve&token2=jake&...
                        tokens.Add(token.Substring(0, token.IndexOf("=")),
                            token.Substring(token.IndexOf("=") + 1, token.Length - token.IndexOf("=") - 1));
                    }
                }

                string access_token = tokens["access_token"];
                Dictionary<string, string> data = new Dictionary<string, string>();
                data.Add("link", "https://www.youtube.com/watch?v=tbcNGOlvPt8");
                data.Add("picture", "http://wakpaper.com/large/Firefox_wallpapers_297.jpg");
                //data.Add("caption", "ASP Snippets");
                //data.Add("name", "ASP Snippets");
                data.Add("message", "this is sandeep vemula");

                var client = new FacebookClient(access_token);
                client.Post("/USER_ID/feed", data);
               
                FacebookClient app = new FacebookClient(access_token);
                dynamic result = app.Post("/PAGE_ID/feed", data);

            }



YOU CAN DOWNLOAD THE DLL FILES FROM HERE,
https://drive.google.com/file/d/0B7SW5veaomExeTRhSmJ2bGt2emc/edit?usp=sharing

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