private void GetProxy()
        {
            svc = new UsuarioService.UsuarioUCClient();
            if (HttpContext.Current != null)
            {
                svc.ClientCredentials.UserName.UserName = HttpContext.Current.Session["loginUsuario"].ToString();
                svc.ClientCredentials.UserName.Password = HttpContext.Current.Session["passwordUsuario"].ToString();
            }
        }