BitmapTests.DrawingView.DrawRect C# (CSharp) Method

        public override void DrawRect(CGRect dirtyRect)
        {
            Graphics g = Graphics.FromCurrentContext();

            g.Clear(Color.Wheat);

            var mainBundle = NSBundle.MainBundle;
            var filePath = mainBundle.PathForResource("CocoaMono","png");

            var bitmap = Image.FromFile(filePath);

            filePath = mainBundle.PathForResource("tiger-Q300","png");

            var tiger = Image.FromFile(filePath);

            using (var ig = Graphics.FromImage(bitmap))
            {
                //ig.Clear(Color.Red);
                var pen = new Pen (Brushes.Yellow, 20);
                var rec = new SizeF (200, 200);
                var recp = new PointF (bitmap.Width - rec.Width - pen.Width / 2, bitmap.Height - rec.Height - pen.Width / 2);
                ig.DrawEllipse (pen, new RectangleF (recp, rec));
            }

            g.DrawImage(bitmap, new Point(50,50));
            g.DrawImage(tiger, new Point(200,200));

            // To test Save uncomment the following lines
            //			var destopDirectory = Environment.GetFolderPath (Environment.SpecialFolder.DesktopDirectory);
            //			var finalPath = System.IO.Path.Combine (destopDirectory, "cocoa-monowithcircle.jpg");
            //
            //			bitmap.Save(finalPath);

            using (SolidBrush brush = new SolidBrush(BACKCOLOR))
            {
                Image pic = GetCircleImage(); //get circle image
                Size newSize = new Size(pic.Size.Width * _scale, pic.Size.Height * _scale);//calculate new size of circle
                g.FillEllipse(brush, new Rectangle(_circleLocation, newSize));//draw the shape background
                g.DrawImage(pic, new Rectangle(_circleLocation, newSize));//draw the hatch style
            }

            g.Dispose();
        }