protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
this.ShutdownMode = ShutdownMode.OnExplicitShutdown;
TP = new TP();
TP.Show();
}
private void BtnPr_Click(object sender, RoutedEventArgs e)
{
TP tp = new TP();
tp.Show();
}