public void CompareToClientEqually()
        {
            BaseClient  client1  = new NormalClient(Guid.NewGuid(), "Владелец1");
            BaseAccount account1 = new SavingsAccount(Guid.NewGuid(), 1000);

            client1.AddAccount(account1);
            BaseClient  client2  = new NormalClient(Guid.NewGuid(), "Владелец2");
            BaseAccount account2 = new SavingsAccount(Guid.NewGuid(), 1000);

            client2.AddAccount(account2);

            int result = client1.CompareTo(client2);

            Assert.AreEqual(0, result);
        }