private Rectangle GetMaze()
{
if (!Rectangles.Any())
{
return(Rectangle.Empty);
}
var top = Rectangles.Min(rectangle => rectangle.Top);
var bottom = Rectangles.Max(rectangle => rectangle.Bottom);
var left = Rectangles.Min(rectangle => rectangle.Left);
var right = Rectangles.Max(rectangle => rectangle.Right);
return(new Rectangle(left, top, Math.Abs(right - left), Math.Abs(bottom - top)));
}