public void VisitRectangle(Rectangle rect)
{
var x = (int)_params[0];
var y = (int)_params[1];
var width = (int)_params[2];
var height = (int)_params[3];
var color = (Color)_params[4];
rect.Accept(new ReplaceShape(x, y));
rect.Width = width;
rect.Height = height;
rect.Color = color;
}
public void UpdateRectangle(Rectangle r, int x, int y, int width, int height, Color color)
{
r.Accept(new UpdateShape(x, y, width, height, color));
CreateMemento();
}