GIF Image open ???

this is a pcr1.aspx page code............ 
1    protected void Button1_Click(object sender, EventArgs e)
2        {
3            //string imgsrc = ConfigurationSettings.AppSettings["gifimgsrc"].ToString();
4            string imgsrc = System.Configuration.ConfigurationManager.AppSettings["gifimgsrc"].ToString();
5            string tempimg = System.Configuration.ConfigurationManager.AppSettings["tempimg"].ToString();
6          &nb ...