datatable序列化为string

private static string SerializeDataTableXml(DataTable pDt)
{
   // 序列化DataTable
   StringBuilder sb = new StringBuilder();
   XmlWriter writer = XmlWriter.Create(sb);
   XmlSerializer serializer = new XmlSerializer(typeof(DataTable));
   serializer.Serialize(writer, pDt);
   writer.Close();
   return sb.ToString();
}
public static DataTable DeserializeDataTable(string pXml)
{
    StringReader strReader = new StringReader(pXml);
    XmlReader xmlReader = XmlReader.Create(strReader);
    XmlSerializer serializer = new XmlSerializer(typeof(DataTable));
    DataTable dt = serializer.Deserialize(xmlReader) as DataTable;
    return dt;
}