IE need to know about :)  and W3C standard P3P Project took a lot of my time

answer;

protected void Page_Load(object sender, EventArgs e)       

{

  Page.Response.AddHeader("p3p",

      "CP=\"IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT\"");

}