public ConsoleApplication(ICustomer customer, ISeller seller)
{
if (customer == null)
throw new ArgumentNullException(nameof(customer));
if (seller == null)
throw new ArgumentNullException(nameof(seller));
customer.BuyFrom(seller);
var actions = new List<ITradeAction>
{
new PayTradeAction(customer, seller),
new ChooseProductTradeAction(customer, seller),
new RequestChangeTradeAction(customer, seller)
};
Main = new MajorTradeAction(customer, seller, actions);
}