public void Demo1()
{
IProductFactory factory = new ConcreteProductAFactory();
IProduct product = factory.CreateProduct();
Contract.Assert(product.GetType() == typeof(ConcreteProductA));
}
// ctor eller anden nyttig function?
public void DoSomething()
{
_myProduct = MakeProduct();
Console.WriteLine(_myProduct.GetType().Name + " says hello!");
}
