private void Drop(DragEventArgs e)
        {
            Canvas canvas = new Canvas();

            canvas = (Canvas)e.Source;
            Model.Bal balM = new Model.Bal();
            balM.BalKleur = (Brush)e.Data.GetData("deBal");

            balM.xPos = e.GetPosition(canvas).X - 20;
            balM.yPos = e.GetPosition(canvas).Y - 20;

            BalVM balVM = new BalVM(balM);

            ballen.Add(balVM);
        }
        private void Drop(DragEventArgs e)
        {
            Canvas canvas = new Canvas();
            canvas = (Canvas)e.Source;
            Model.Bal balM = new Model.Bal();
            balM.BalKleur = (Brush)e.Data.GetData("deBal");

            balM.xPos = e.GetPosition(canvas).X - 20;
            balM.yPos = e.GetPosition(canvas).Y - 20;

            BalVM balVM = new BalVM(balM);

            ballen.Add(balVM);
        }