public static void Main()
{
ShapeCache shapeCache = new ShapeCache();
Triangle t = shapeCache.GetTriangleInstance();
t.SetId(1);
Triangle t2 = shapeCache.GetTriangleInstance();
t2.SetId(3);
t.Draw();
Console.WriteLine(t.GetId());
t2.Draw();
Console.WriteLine(t2.GetId());
//Console.WriteLine(t.GetId());
}