static void Main(string[] args)
 {
     Application app = new Application();
     MainWindow win = new MainWindow();
     //TestWnd win = new TestWnd();
     app.Run(win);
 }
        public void HealthEvalutation()
        {
            if (_mainWnd != null)
            {
                _mainWnd.Show();
                return;
            }

            _mainWnd = new MainWindow();
            _mainWnd.Closed += (o, args) =>
                {
                    _mainWnd = null;
                };
            _mainWnd.Show();
        }