static void Main(string[] args)
{
ShapeManager manager1 = new ShapeManager();
manager1.AddShape(new Circle(2.5f));
manager1.AddShape(new Circle(ConsoleColor.Red, 10));
manager1.AddShape(new Ellipse(2, 4));
manager1.AddShape(new Ellipse(ConsoleColor.Magenta, 2, 4));
manager1.AddShape(new Rectangle(4, 5));
manager1.AddShape(new Rectangle(ConsoleColor.DarkYellow, 8.25f, 2.5f));
Console.WriteLine("Overall number of shapes in list: {0}.", manager1.Count);
manager1.DisplayAll();
Console.BackgroundColor = ConsoleColor.Black;
StringBuilder sb = new StringBuilder();
manager1.Save(sb);
Console.WriteLine(sb.ToString());
manager1.ShapeCompare((IComparable)manager1[1], (IComparable)manager1[2]);
manager1.ShapeCompare((IComparable)manager1[3], (IComparable)manager1[3]);
manager1.ShapeCompare((IComparable)manager1[3], (IComparable)manager1[4]);
manager1.WriteSortedShapeList();
}