Export to Microsoft Excel from Datatable in C#.Net

public void ExportToExcel(DataTable dt)
{
 if (dt.Rows.Count > 0)
 {
  string filename = "Sample.xls";
  System.IO.StringWriter tw = new System.IO.StringWriter();
  System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);

  Grid1.DataSource = dt;
  Grid1.DataBind();

  //Get HTML for the control.
  Grid1.RenderControl(hw);

  Response.ContentType = "application/vnd.ms-excel";
  Response.AppendHeader("Content-Disposition", "attachment; filename=" + filename + "");
  this.EnableViewState = false;
  Response.Write(tw.ToString());
  Response.End();
 }
}

public override void VerifyRenderingInServerForm(Control control)
{

}