public override void DrawRect(CoreGraphics.CGRect dirtyRect)
{
base.DrawRect(dirtyRect);
// var bounds: NSRect = self.bounds
//var border: NSBezierPath = NSBezierPath(roundedRect: NSInsetRect(bounds, 0.5, 0.5), xRadius: 3, yRadius: 3)
//NSColor(red: 47 / 255.0, green: 146 / 255.0, blue: 204 / 255.0, alpha: 1.0).set()
//border.stroke()
var bound = this.Bounds;
bound.X = 0.5f;
bound.Y = 0.5f;
bound.Height -= 1f;
bound.Width -= 1f;
var selectionPath = NSBezierPath.FromRoundedRect(bound, 7, 7);
NSColor.FromDeviceRgb(153, 153, 153);
selectionPath.Stroke();
}