public class RefreshRateChangedEventArgs : EventArgs
        {
            public double RefreshRateChanged { get; set; }
        }
        public class GameVersionChangedEventArgs : EventArgs
        {
            public string GameVersionChanged { get; set; }
        }
        public event EventHandler<RefreshRateChangedEventArgs> RefreshRateChanged;
        public event EventHandler<GameVersionChangedEventArgs> GameVersionChanged;

        private string _game_version = string.Empty;
        public string GameVersion
        {
            get { return _game_version; }
            set
            {
                if (value != _game_version)
                    GameVersionChanged?.Invoke(this, value);
                _game_version = value;
            }
        }

        private double _refresh_rate = 1000 / 15d;
        public double RefreshRate // per sec
        {
            get { return _refresh_rate; }
            set
            {
                if (Math.Abs(value - _refresh_rate) > 0.01)
                    RefreshRateChanged?.Invoke(this, value);
                _refresh_rate = value;
            }
        }