同时执行多条sql语句提高性能

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;
public partial class test : System.Web.UI.Page
{
protected override void OnLoad(EventArgs e)
{
//using (SqlConnection sqlcon=new SqlConnection ("Data Source=.;Initial Catalog=mytest;Integrated Security=True"))
//{
//    sqlcon.Open();
//    SqlCommand sqlcmd = new SqlCommand("pro_insertStu", sqlcon);
//    sqlcmd.CommandType = CommandType.StoredProcedure;
//    SqlCommandBuilder.DeriveParameters(sqlcmd);
//    sqlcmd.Parameters.RemoveAt(0);
//    sqlcmd.Parameters[0].Value = "软件中国";
//    sqlcmd.Parameters[1].Value = "cccccc";
//    SqlDataAdapter sdar = new SqlDataAdapter(sqlcmd);
//    DataSet ds = new DataSet();
//    sdar.Fill(ds);
//    Response.Write(ds.Tables[0].Rows[0][0].ToString()+"<br/>");//第一个结果集的数据
//    Response.Write(ds.Tables[1].Rows[0][0].ToString() + "<br/>");//第二个结果集的数据
//    Response.Write(ds.Tables[3].Rows[0][1].ToString());//第四个结果集的数据
//}
}
protected void Button1_Click(object sender, EventArgs e)
{
using (SqlConnection sqlcon = new SqlConnection("Data Source=.;Initial Catalog=mytest;Integrated Security=True"))
{
sqlcon.Open();
SqlCommand sqlcmd = new SqlCommand("select *from StuInfo;select * from  t2", sqlcon);
//sqlcmd.CommandType = CommandType.StoredProcedure;
//SqlCommandBuilder.DeriveParameters(sqlcmd);
//sqlcmd.Parameters.RemoveAt(0);
//sqlcmd.Parameters[0].Value = "软件中国";
//sqlcmd.Parameters[1].Value = "cccccc";
SqlDataAdapter sdar = new SqlDataAdapter(sqlcmd);
DataSet ds = new DataSet();
sdar.Fill(ds);
Response.Write(ds.Tables[0].Rows[0][2].ToString() + "<br/>");//第一个结果集的数据
Response.Write(ds.Tables[1].Rows[0][1].ToString() + "<br/>");//第二个结果集的数据
//Response.Write(ds.Tables[3].Rows[0][1].ToString());//第四个结果集的数据
}

}
}