public static string ToJSONString(List <IncomeStatistics> listData) { try { string jsonStr = ""; jsonStr += "{"; jsonStr += "\"message\": \"Okay\","; jsonStr += "\"data\": ["; for (int i = 0, lenght = listData.Count; i < lenght; i++) { jsonStr += "["; long ticks = JSONUtilities.GetJavascriptTimestamp(listData[i].OrderDate); jsonStr += ticks + ", "; jsonStr += listData[i].DetailTotal.ToString(); jsonStr += "]"; if (i < lenght - 1) { jsonStr += ", "; } } jsonStr += "]"; jsonStr += "}"; return(jsonStr); } catch (Exception ex) { throw ex; } }