byte[] LogMsgByte = null;    

                DataTable dtMessageInfo = new DataTable();

                //将datatable转换为数组               

                dtMessageInfo.TableName = "MSGInfoName";
                MemoryStream streamSaveUldByte = new MemoryStream();
                dtMessageInfo.WriteXml(streamSaveUldByte, XmlWriteMode.WriteSchema);
                LogMsgByte = streamSaveUldByte.ToArray();

                //将数组转换为datatable
                MemoryStream stream = new MemoryStream(LogMsgByte);
                dtMessageInfo.ReadXml(stream);