Facebook status post error c# sdk -

i'm developing facebook app, i'm unexperianced it. wanted post status page, posted once. other posting trials didn't give result. no compile-time or run-time errors, no posts on wall either. here code.

fbclient.postcompleted += (o, v) =>         {             if (v.error == null)             {                 var resultante = (idictionary<string, object>)v.getresultdata();                 var newpostid = (string)resultante["id"];             }         };         //dynamic parameters = new expandoobject();         var parameters = new dictionary<string, object>();         parameters["message"] = txtwrite.text;         lbposttowall.click += lbposttowall_click;         fbclient.post("me/feed", parameters);