Rectangle r = this.Bounds;

            Rectangle r = this.Bounds;
            Image img = new System.Drawing.Bitmap(r.Width, r.Height);
            Graphics g = Graphics.FromImage(img);
            Point pt = this.PointToScreen(this.Location);
            g.CopyFromScreen(pt, new Point(0, 0), r.Size);
            string assemblypath = string.Empty;
            assemblypath = "E://txt.bmp";
            img.Save(assemblypath);
            System.Diagnostics.Process.Start(assemblypath);