public override bool CreateTopBorderView(View topView) { if (topView == null) { return(false); } topView.Layout = new LinearLayout() { LinearOrientation = LinearLayout.Orientation.Horizontal, LinearAlignment = LinearLayout.Alignment.CenterVertical, CellPadding = new Size2D(20, 20), }; title = new TextLabel() { Text = "CustomBorder", }; var button = new Button() { Text = "AlwaysOnTop", }; button.Clicked += (s, e) => { BorderWindow.EnableFloatingMode(true); }; topView.Add(title); topView.Add(button); return(true); }