public void UpdateMeta(string title, string keyword, string desc)

    {

        for (int i = this.Header.Controls.Count - ; i >= ; i--)

        {

            if (this.Header.Controls[i].GetType() == typeof(HtmlMeta))

            {

                HtmlMeta hmt = (HtmlMeta)this.Header.Controls[i];

                if (hmt.Attributes["name"] != null)

                    this.Header.Controls.RemoveAt(i);

            }

        }

        this.Page.Title = title;

        HtmlMeta hm = new HtmlMeta();

        hm.Name = "keywords";

        hm.Content = keyword;

        Header.Controls.AddAt(, hm);

        HtmlMeta hm1 = new HtmlMeta();

        hm1.Name = "description";

        hm1.Content = desc;

        Header.Controls.AddAt(, hm1);

    }