public static void Run()
{
ShapePublisher shape = new ShapePublisher();
Subscriber1 sub = new Subscriber1(shape);
Subscriber2 sub2 = new Subscriber2(shape);
shape.Draw();
}
public Subscriber2(ShapePublisher shape)
{
IShape d = (IShape)shape;
d.OnDraw += d_OnDraw;
}
// References the shape object as an IDrawingObject
public Subscriber1(ShapePublisher shape)
{
IDrawingObject d = (IDrawingObject)shape;
d.OnDraw += d_OnDraw;
}