#region JSON API

    public static string ObjectToJson(object o, Type t, Type[] pTypes = null)
    {
        DataContractJsonSerializer serializer = (pTypes != null ? new DataContractJsonSerializer(t, pTypes) : new DataContractJsonSerializer(t));
        MemoryStream mStrm = new MemoryStream();
        serializer.WriteObject(mStrm, o);
        mStrm.Position = 0;
        using (var sr = new StreamReader(mStrm, Encoding.UTF8))
        {
            return sr.ReadToEnd();
        }
    }

    public static object JsonToObject(string json, Type t, Type[] pTypes = null)
    {
        DataContractJsonSerializer serializer = (pTypes != null ? new DataContractJsonSerializer(t, pTypes) : new DataContractJsonSerializer(t));
        using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(json)))
        {
            return serializer.ReadObject(stream);
        }
    }

    #endregion // JSON  API

public bool ListOfGames(bool pMyGames, bool pGamesITookPartIn)
    {
        this.GamesListInfo = null;
        this.LastErrorInfo = null;
        try
        {
            string formValues =
                "&playerId=" + this.LogonInfo.userId.ToString() +
                "&createdBy=" + pMyGames.ToString() +
                "&tookPartIn=" + pGamesITookPartIn.ToString() +
                "";

            WebRequest request = createRequest("myGamesList", formValues);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            using (StreamReader sr = new StreamReader(response.GetResponseStream()))
            {
                string responseText = sr.ReadToEnd();

                if (responseText.Contains(""errType":"))
                    this.LastErrorInfo = (ErrorInfoContract)JsonToObject(responseText, typeof(ErrorInfoContract));
                else
                    this.GamesListInfo = (GamesListContract)JsonToObject(responseText, typeof(GamesListContract), new Type[] { typeof(GameInfoContract) });

                Trace.WriteLineIf(TrcLvl.TraceInfo, TrcLvl.TraceInfo ? string.Format("NewGame.ListOfGames: {0}{1}",
                    (this.LogonInfo != null ? this.LogonInfo.ToString() : ""), (this.LastErrorInfo != null ? this.LastErrorInfo.ToString() : "")) : "");
            }
        }
        catch (Exception exc)
        {
            this.LastErrorInfo = new ErrorInfoContract()
                {
                    errType = exc.GetType().ToString(),
                    message = exc.Message,
                    stackTrace = exc.StackTrace,
                    timestamp = StrUtils.NskTimestampOf(DateTime.Now)
                };
        }
        return (this.LogonInfo != null && this.LogonInfo.userId > 0 && this.LogonInfo.authKey > 0);
    }

    private WebRequest createRequest(string pAction, string pFormValues)
    {
        WebRequest request = WebRequest.Create(this.ServerUrl + "?action=" + pAction);

        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";
        request.ContentLength = pFormValues.Length;

        byte[] data = Encoding.UTF8.GetBytes(pFormValues);
        using (Stream strm = request.GetRequestStream())
        {
            strm.Write(data, 0, data.Length);
        }
        return request;
    }