private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            SolidBrush brush;
            Pen p=null;
           Point connectionPointStart;
           Point connectionPointEnd;
           Graphics g = e.Graphics;
           bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height);
           Graphics bitmapGraphics = Graphics.FromImage(bmp);
           //g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
           
               moveCounter++;
               label6.Text = moveCounter.ToString();
           
               brush = new SolidBrush(Color.Red);
               p = new Pen(brush);
               for (int idx = 0; idx < wireObject1._point_X.Count; ++idx)
               {
                   Point dPoint = new Point((int)wireObject1._point_X, (int)wireObject1._point_Y);
                   dPoint.X = dPoint.X - 5; // was - 2
                   dPoint.Y = dPoint.Y - 5; // was - 2
                   Rectangle rect = new Rectangle(dPoint, new Size(10, 10));
                   g.FillEllipse(brush, rect);
                   bitmapGraphics.FillEllipse(brush, rect);
                   
                   // g.FillEllipse(brush, rect);
               }
               for (int i = 0; i < wireObject1._connectionstart.Count; i++)
               {
                   int startIndex = wireObject1._connectionstart;
                   int endIndex = wireObject1._connectionend;
                   connectionPointStart = new Point((int)wireObject1._point_X, (int)wireObject1._point_Y);
                   connectionPointEnd = new Point((int)wireObject1._point_X, (int)wireObject1._point_Y);
                   p.Width = 2;
                   g.DrawLine(p, connectionPointStart, connectionPointEnd);
                   bitmapGraphics.DrawLine(p, connectionPointStart, connectionPointEnd);
               }
               
        }

private void SavePictureBoxToBitmap()
        {
            //PbToBitmap++;
            //String tempFile = @"d:\PictureBoxToBitmap\" + PbToBitmap.ToString("D6") + bmp;
            bmp.Save(@"d:\PictureBoxToBitmap\bit.bmp");
        }