public DataContext()
{
Customers = new List <Customer>();
Events = new List <Event>();
ProductsCatalog = new ProductsCatalog();
ProductsState = new ProductsState(ProductsCatalog);
}
public Sale(Customer customer, DateTime date, ProductsState productsState) : base(date, productsState)
{
Customer = customer;
}
public Supply(DateTime date, ProductsState productsState) : base(date, productsState)
{
}
public Event(DateTime date, ProductsState productsState)
{
Date = date;
ProductsState = productsState;
}
