DataSet有多个DataTable，输出的XML的内容和格式

生成的代码

using System;
using System.Data;

public partial class WebForms_Test_TestOne : System.Web.UI.Page
{

    /// <summary>
    /// 
    /// </summary>
    /// <returns></returns>
    protected DataTable DataTableOne()
    {
        DataTable theResult = new DataTable();
        theResult.Columns.Add("ID");
        theResult.Columns.Add("TheName");

        DataRow dr = null;

        dr = theResult.NewRow();
        theResult.Rows.Add(dr);

        dr["ID"] = "1";
        dr["TheName"] = "one";

        dr = theResult.NewRow();
        theResult.Rows.Add(dr);

        dr["ID"] = "2";
        dr["TheName"] = "two";

        dr = theResult.NewRow();
        theResult.Rows.Add(dr);

        dr["ID"] = "3";
        dr["TheName"] = "three";

        return theResult;
    }


    /// <summary>
    /// 
    /// </summary>
    /// <returns></returns>
    protected DataTable DataTableTwo()
    {
        DataTable theResult = new DataTable();
        theResult.Columns.Add("Guid");
        theResult.Columns.Add("Name");
        theResult.Columns.Add("Code");

        DataRow dr = null;

        dr = theResult.NewRow();
        theResult.Rows.Add(dr);

        dr["Guid"] = "1";
        dr["Name"] = "gOne";
        dr["Code"] = "codeOne";


        dr = theResult.NewRow();
        theResult.Rows.Add(dr);

        dr["Guid"] = "2";
        dr["Name"] = "gTwo";
        dr["Code"] = "codeTwo";

        return theResult;
    }

    protected void DataBindTheControls()
    {
        DataSet ds = new DataSet();
        DataTable dt = null;
        
        dt = DataTableOne();
        dt.TableName = "TableOne";
        ds.Tables.Add(dt);

        dt = DataTableTwo();
        dt.TableName = "TableTwo";
        ds.Tables.Add(dt);

        txt_Output.Text = ds.GetXml();
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        DataBindTheControls();
    }
}

名为“TableOne”的 DataTable 已属于此 DataSet。