slide.cs

using (var newImage = new Bitmap(width:wid, height:hei))
            {
                using(Graphics g = Graphics.FromImage(newImage))
                {
                    var imageWidth = this.RayTracerView?.Size.Width ?? 64;
                    var imageHeight = this.RayTracerView?.Size.Height ?? 64;

                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
                    g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

                    g.CopyFromScreen(new Point(X, Y),Point.Empty, new Size(wid, hei));

                    AdjustContrast(newImage,20);

                    slide = new Bitmap(newImage, new Size(imageWidth, imageHeight));
                    slide.SetResolution(600,600);
                }
            }