public override void ViewDidLoad() { base.ViewDidLoad (); View.BackgroundColor = UIColor.White; _fbShare = new UIButton(UIButtonType.RoundedRect); _fbShare.TouchUpInside += OnLoginClicked; _fbShare.SetTitle("Share in Facebook", UIControlState.Normal); _fbShare.SetTitleColor (UIColor.White, UIControlState.Normal); _fbShare.BackgroundColor = UIColor.Blue; _fbShare.SizeToFit (); View.AddSubview (_fbShare); _fbShare.Begin().MoveY(50).LMargin(20).Commit(); }