private void Form1_Load(object sender, EventArgs e)
 {
     draw = new CadDraw(pictureBox1);
     draw.CreateSomeObjects(12);
     draw.Popupmenu = contextMenuStrip1;
     draw.PopupOpening();
 }
 public CadRectangle(CadDraw draw)          
 {
     Draw = draw;
 }
 public CadEllipse(CadDraw draw)
 {
     Draw = draw;
 }