Last.fm API For A Windows Phone App – Scrobbling A Track

public void ScrobbleTrack ( string artist , string track , string sessionKey , Action < string > onCompletion ) { string currentTimestamp = DateHelper . Add ( "sk" , sessionKey ); string signature = GetSignature ( parameters ); string comboUrl = string . Concat ( CORE_URL , "?method=track.scrobble" , "&api_key=" , API_KEY , "&artist[0]=" , artist , "&track[0]=" , track , "&sk=" , sessionKey , "×tamp[0]=" , currentTimestamp , "&api_sig=" , signature ); var client = new WebClient (); client .