Exporting data from sql database to excel spreadsheet

Could you please modify the code to work for a desktop application.I tried changing it myself,but i do not know what to use to replace the Response keyword

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        GridAllRecord.AllowPaging = false;

        bindData();

        Response.Clear();

        Response.Buffer = true;

        Response.ContentType="application/vnd.ms-excel";

        Response.Charset = "";

        this.EnableViewState = false;

        System.IO.StringWriter  oStringWriter = new System.IO.StringWriter();

        System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);

        GridAllRecord.RenderControl(oHtmlTextWriter);

        Response.Write(oStringWriter.ToString());

        Response.End();      

    }

    SqlConnection con;

    SqlDataAdapter da;

    SqlCommand cmd = new SqlCommand();

    DataSet ds = new DataSet();

    public void bindData()

    {

        con = new SqlConnection("Data Source=MCN101;Initial Catalog=Data; Uid=sa; pwd=");

        cmd.CommandText = "select pg_FirstName,pg_LastName,pg_StudioName, pg_Address, pg_Phone,pg_City, pg_State, pg_Country from tbl_PhotographerProfile";

        cmd.Connection = con;

        da = new SqlDataAdapter(cmd);

        da.Fill(ds);

        con.Open();

        cmd.ExecuteNonQuery();

        GridAllRecord.DataSource = ds;

        GridAllRecord.DataBind();

    }

    public void gridedit_PageIndexChanged(object source, DataGridPageChangedEventArgs e)

    {

        GridAllRecord.CurrentPageIndex = e.NewPageIndex;

        bindData();

    }

}