S7xcKJ4L

1 public class Foo1
2    {
3        public static async Task RunAsync()
4        {
5            var clients =await GetClients();
6            int activeCount = 0,inactiveCount=0;
7            foreach (var client in clients)
8            {
9                if (client.IsActive)
10                    activeCount++;
11                else
12                    inactiveCount++;
13            }
14            Console.WriteLine($"Найдено {clients.Count} клиентов. Активных {activeCount}, неактивных {inactiveCount}");
15            var appropriateClients = new List<Client>();
16            foreach (var client in clients)
17            {
18                if(client.IsActive&&IsAppropriateEmail(client))
19                    appropriateClients.Add(client);
20            }
21
22            Console.WriteLine($"Найдено {appropriateClients.Count}");
23            Console.ReadLine();
24        }
25
26        private static bool IsAppropriateEmail(Client client)
27        {
28            return client.Email.EndsWith(".ru");
29        }
30
31        private static async Task<List<Client>> GetClients()
32        {
33            //TODO: получать данных из БД
34            var result = new List<Client>();
35            for (int i = 1; i <= 10000000; i++)
36            {
37                var client = new Client
38                {
39                    Name = "клиент " + i,
40                    IsActive = i % 2 == 0 || i % 5 == 0
41                };
42
43                string domain = "yandex.ru";
44                if (i % 3 == 0)
45                {
46                    domain = "gmail.com";
47                }
48                else if (i % 5 == 0)
49                {
50                    domain = "mail.ru";
51                }
52                else if (i % 9 == 0)
53                {
54                    domain = "yandex.ua";
55                }
56                else if (i % 11 == 0)
57                {
58                    domain = "yandex.kz";
59                }
60
61                client.Email = $"client{i}@{domain}";
62                result.Add(client);
63            }
64            return result;
65        }
66
67        public class Client
68        {
69            public string Name { get; set; }
70
71            public string Email { get; set; }
72
73            public bool IsActive { get; set; }
74        }
75    }