How to rearrange datacolumns in a dataset from related datatables

[Sri13]

Hi

I have 3 tables related by some keys. I add these three tables to a dataset and finally write to XML file. The XML file is then sent to the client. Since I added the relations, the XML shows proper hierarchy. I am facing an issue that the XML file shows the related data in sequencial order. Ex:

<table1>
  <table1_col1>col1</table1_col1>
  <table1_col2>col2</table1_col2>
  <table1_col3>col3</table1_col3>
  <table2>
    <table2_col1>col1</table2_col1>
    <table2_col2>col2</table2_col2>
    <table3>
          <table3_col1>col1</table3_col1>
    </table3>
  </table2>
</table1>

But actually, I want to see the output as:

<table1>
  <table1_col1>col1</table1_col1>
  <table2>
    <table2_col1>col1</table2_col1>
    <table2_col2>col2</table2_col2>
    <table3>
          <table3_col1>col1</table3_col1>
    </table3>
  </table2>
  <table1_col2>col2</table1_col2>
  <table1_col3>col3</table1_col3>
</table1>

I am creating each databale dynamically and add the relations and tables to the dataset. And then call WriteXML to create the output. I am not sure if I can use SetOrdinal to arrange the entire datatable? Please help.