.net将JSON字符串转换为DataTable

public static DataTable ToDataTable(string json)
        {
            DataTable dataTable = new DataTable();  //实例化
            DataTable result;
            JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
            javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
            ArrayList arrayList = javaScriptSerializer.Deserialize(json);
            if (arrayList.Count > 0)
            {
                foreach (Dictionary dictionary in arrayList)
                {
                    //if (dictionary.Keys.Count() == 0)
                    if (dictionary.Keys.Count == 0)
                    {
                        result = dataTable;
                        return result;
                    }
                    if (dataTable.Columns.Count == 0)
                    {
                        foreach (string current in dictionary.Keys)
                        {
                            dataTable.Columns.Add(current, dictionary[current].GetType());
                        }
                    }
                    DataRow dataRow = dataTable.NewRow();
                    foreach (string current in dictionary.Keys)
                    {
                        dataRow[current] = dictionary[current];
                    }

                    dataTable.Rows.Add(dataRow);
                }
            }
            result = dataTable;
            return result;
        }