/// <summary>
/// Constructor setting just the basic attributes of Polyline.
/// </summary>
/// <param name="height">Hright of Rectangle.</param>
/// <param name="width">Width of Rectangle.</param>
/// <param name="start">The left botton coordinate of the smallest rectangle enclosing the shape.</param>
public Rectangle(int height, int width, Coordinate start) : base(ShapeType.RECTANGLE)
{
Height = height;
Width = width;
Start = start.Clone();
}