public MainWindow()
 {
     InitializeComponent();
     sm   = new ShapeManager(this);
     cm   = new CanvasManager(this);
     clrm = new ColorManager(this);
     cb_Shapes.ItemsSource = new ShapeManager(this).ListShapes;
     clrm.LoadColors();
     sm.LoadShapes();
     cm.LoadCanvasses();
 }
 //Constructors
 public CanvasManager(MainWindow w)
 {
     MainWindow   = w;
     ShapeManager = new ShapeManager(w);
 }