SFML.Net fullscreen

using System;
using SFML.Window;
using SFML.Graphics;

namespace Test
{
    class NewTest
    {
        private RenderWindow window;
        private bool toggle = true;
        public void Run()
        {
            Toggle();
            var tex = new Texture(1, 1);
            tex.Update(new byte[] {255,255,255,255});
            var sprite = new Sprite(tex);
            sprite.Scale = new Vector2f(100,100);

            while (window.IsOpen())
            {
                window.Clear();
                window.Draw(sprite);
                window.Display();
                window.DispatchEvents();
            }
        }

        void Toggle()
        {
            if (window != null)
            {
                window.Closed -= WindowOnClosed;
                window.KeyPressed -= window_KeyPressed;
                window.Close();
            }

            var style = toggle ? Styles.Default : Styles.Fullscreen;
            toggle = !toggle;
            window = new RenderWindow(new VideoMode(800,600), "Game", style);
            window.Closed += WindowOnClosed;
            window.KeyPressed +=window_KeyPressed;

        }

        void window_KeyPressed(object sender, KeyEventArgs e)
        {
            if(e.Code == Keyboard.Key.Return && e.Alt)
                Toggle();
        }

        private void WindowOnClosed(object sender, EventArgs eventArgs)
        {
            window.Close();
        }
    }

    static class Program
    {
        public static void Main()
        {
            var test = new NewTest();
            test.Run();
        }
    }
}