private void AddOffer()
{
Console.WriteLine("Write index of visitor:\n");
int ind = Convert.ToInt16(Console.ReadLine());
if (visitorsList.GetInfo(ind).offers.Offer.Count >= 5)
{
throw new Exception("Can't add more offers");
}
Console.WriteLine("Write index of book:\n");
int index = Convert.ToInt16(Console.ReadLine());
visitorsList.AddOffer(ind, docsList.GetInfo(index));
Console.WriteLine("Succesfull");
Console.ReadKey();
}
