protected override void Initialize()
        {
            core = new Core(Content, GraphicsDevice, Window);
            IsMouseVisible = true;

            base.Initialize();
        }
        protected override void Initialize()
        {
            core = new Core(Content, GraphicsDevice, Window);
            IsMouseVisible = true;

            graphics.PreferredBackBufferWidth = 800;
            graphics.PreferredBackBufferHeight = 600;
            graphics.ApplyChanges();

            base.Initialize();
        }