public string GetUserUniqueName()
            {
                try
                {
                     if (Session["UserID"] != null)
                     {

                           Response.Write("<BR><BR>USER ID: " + Session["UserID"].ToString());
                           return Session["UserID"].ToString();
                     }
                     else
                     {
                        return "Your APP lost the session";
                     }
                }
                catch(Exception s)
                {
                    Response.Write("------Error Message: " + s.Message + "--------Stack trace: " + s.StackTrace);
                }
                return null;
            }