public PersonContract(int contracrNum, PersonSubscriber client, ITariffPlan plan, List <int> phoneNums)
{
Subscriber = client;
PhoneNumbers.AddRange(phoneNums);
Plan.Add(DateTime.Today, plan);
}
public PersonContract(int contracrNum, PersonSubscriber client, TariffPlan plan, int phoneNum)
{
Subscriber = client;
PhoneNumber = phoneNum;
Plan.Add(DateTime.Today, plan);
}