jason数据怎么转成XML数据

XmlDictionaryReader reader = JsonReaderWriterFactory.CreateJsonReader(Encoding.UTF8.GetBytes(xml), XmlDictionaryReaderQuotas.Max);            XmlDocument xdoc = new XmlDocument();            xdoc.Load(reader);
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C# code
public static string DataTableToJSON(DataTable table)        {            StringBuilder json = new StringBuilder();            json.Append("[");            for (int i = 0; i < table.Rows.Count; i++)            {                DataRow row = table.Rows[i];                // json object                json.Append("{");                for (int j = 0; j < table.Columns.Count; j++)                {                    string columnName = table.Columns[j].ColumnName;                    string columnType = table.Columns[j].DataType.Name;                    // json field                    if (columnType == "Int32" || columnType == "Int16" || columnType == "Decimal")                    {                        // don't surround numbers with quotes                        json.AppendFormat("\"{0}\":\"{1}\"", columnName, row.IsNull(columnName) ? "" : row[columnName]);                    }                    else if (columnType == "Boolean")                    {                        // make the bool value lowercase                        json.AppendFormat("\"{0}\":{1}", columnName, row.IsNull(columnName) ? "" : row[columnName].ToString().ToLower());                    }                    else                    {                        // everything else gets quotes around the data                        json.AppendFormat("\"{0}\":\"{1}\"", columnName, row[columnName]);                    }                    if (j < table.Columns.Count - 1) json.Append(","); // add comma if not last column                }                json.Append("}");                if (i < table.Rows.Count - 1) json.Append(","); // add comma if not last row            }            json.Append("]");            return json.ToString();        }