Load 2 GB XML file to SQL server using sqlbulkcopy

ds.ReadXml(Server.MapPath("~/Data.xml"))

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;


namespace WebApplication1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Unnamed1_Click(object sender, EventArgs e)
        {
            string cs = ConfigurationManager.ConnectionStrings["CS"].ConnectionString;

            using (SqlConnection con = new SqlConnection(cs))
            {
                DataSet ds = new DataSet();

                ds.ReadXml(Server.MapPath("~/Data.xml"));


                DataTable mOb = ds.Tables["managedObject"];
                DataTable mOb_p = ds.Tables["p"];


                con.Open();


                using (SqlBulkCopy sb = new SqlBulkCopy(con))
                {
                    sb.DestinationTableName = "managedObject";
                    sb.ColumnMappings.Add("managedObject_Id", "managedObject_Id");
                    sb.ColumnMappings.Add("class", "class");
                    sb.ColumnMappings.Add("version", "version");
                    sb.ColumnMappings.Add("distName", "distName");
                    sb.ColumnMappings.Add("id", "id");
                    sb.ColumnMappings.Add("cmData_Id", "cmData_Id");
                    sb.BatchSize = 500000;
                    sb.BulkCopyTimeout = 10800;
                    sb.WriteToServer(mOb);
                }

                using (SqlBulkCopy sb = new SqlBulkCopy(con))
                {
                    sb.DestinationTableName = "p";
                    sb.ColumnMappings.Add("name", "name");
                    sb.ColumnMappings.Add("p_text", "p_text");
                    sb.ColumnMappings.Add("managedObject_Id", "managedObject_Id");
                    sb.BatchSize = 500000;
                    sb.BulkCopyTimeout = 10800;
                    sb.WriteToServer(mOb_p);
                }


            }
        }
    }
}