public void AddWindow(Window window)
        {
            var mm = new MultiMonWindow(window);

            if (!_windows.ContainsKey(window))
                _windows.Add(window, mm);
        }
        public void AddWindow(Window window)
        {
            var mm = new MultiMonWindow(window);

            if (!_windows.ContainsKey(window))
            {
                _windows.Add(window, mm);
            }
        }