protected void Page_Load(object sender, EventArgs e)
    {
        int loop1, loop2;
        NameValueCollection coll;

        // Load ServerVariable collection into NameValueCollection object.
        coll = Request.ServerVariables;
        // Get names of all keys into a string array.
        String[] arr1 = coll.AllKeys;
        for (loop1 = 0; loop1 < arr1.Length; loop1++)
        {
            Response.Write("Key" + loop1 + ": " + arr1[loop1] + "<br>");
            String[] arr2 = coll.GetValues(arr1[loop1]);
            for (loop2 = 0; loop2 < arr2.Length; loop2++)
            {
                Response.Write("Value " + loop2 + ": " + Server.HtmlEncode(arr2[loop2]) + "<p>");
            }
        }

    }