private void btn_admin_Click(object sender, RoutedEventArgs e)
 {
     if (tb_pass.Text == "0000")
     {
         App.TypeUser = "******";
         Forms.Menu menu = new Forms.Menu();
         menu.Show();
         Close();
     }
     else
     {
         MessageBox.Show("Неверный пароль");
     }
 }
 private void btn_enter_Click(object sender, RoutedEventArgs e)
 {
     Forms.Menu menu = new Forms.Menu();
     menu.Show();
     Close();
 }