JSON to CSV converter

static void Main(string[] args)
       {
           var json = @"{
                       ""employees"": [
                       { ""firstName"":""John"" , ""lastName"":""Doe"" },
                       { ""firstName"":""Anna"" , ""lastName"":""Smith"" },
                       { ""firstName"":""Peter"" , ""lastName"":""Jones"" }
                       ]
                       }";
           jsonStringToCSV(json);
       }

       public static void jsonStringToCSV(string jsonContent)
       {
           //used NewtonSoft json nuget package
           XmlNode xml = JsonConvert.DeserializeXmlNode("{records:{record:" + jsonContent + "}}");
           XmlDocument xmldoc = new XmlDocument();
           xmldoc.LoadXml(xml.InnerXml);
           XmlReader xmlReader = new XmlNodeReader(xml);
           DataSet dataSet = new DataSet();
           dataSet.ReadXml(xmlReader);
           var dataTable = dataSet.Tables[1];

           //Datatable to CSV
           var lines = new List<string>();
           string[] columnNames = dataTable.Columns.Cast<DataColumn>().
                                             Select(column => column.ColumnName).
                                             ToArray();
           var header = string.Join(",", columnNames);
           lines.Add(header);
           var valueLines = dataTable.AsEnumerable()
                              .Select(row => string.Join(",", row.ItemArray));
           lines.AddRange(valueLines);
           File.WriteAllLines(@"D:/Export.csv", lines);
       }