private void Tile_Mod_Receta_Click(object sender, RoutedEventArgs e)
        {
            ModificarReceta mr = new ModificarReceta();

            mr.Owner = this;
            mr.lb_nombreusuario.Content = lb_nombreusuario.Content;
            mr.ShowDialog();
        }
        private void btnmodificar_Click(object sender, RoutedEventArgs e)
        {
            ModificarReceta modire = new ModificarReceta();

            modire.ShowDialog();
        }