public override void AddToWindow()
{
background = CreateBlurImage(UIImage.FromBundle("background.png"));
imageView = new UIImageView(background);
imageView.TranslatesAutoresizingMaskIntoConstraints = false;
base.AddToWindow();
UIWindow window = UIApplication.SharedApplication.Windows[0];
window.InsertSubview(imageView, 0);
window.AddConstraints(new [] {
NSLayoutConstraint.Create(imageView, NSLayoutAttribute.Left, NSLayoutRelation.Equal, window, NSLayoutAttribute.Left, 1.0f, 0),
NSLayoutConstraint.Create(imageView, NSLayoutAttribute.Top, NSLayoutRelation.Equal, window, NSLayoutAttribute.Top, 1.0f, 0),
NSLayoutConstraint.Create(imageView, NSLayoutAttribute.Right, NSLayoutRelation.Equal, window, NSLayoutAttribute.Right, 1.0f, 0),
NSLayoutConstraint.Create(imageView, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, window, NSLayoutAttribute.Bottom, 1.0f, 0)
});
}
