using System;

using System.Collections.Generic;

using System.Data.SqlClient;

using System.Net.Http;

using System.Threading.Tasks;

​

namespace ConsoleAppCheckDomain

{

    public class Cache

    {

        private readonly Dictionary<string, object> _dictionary;

​

        public Cache()

        {

            _dictionary = new Dictionary<string, object>();

        }

​

        public void SetItem(string key, object value)

        {

            _dictionary[key] = value;

        }

​

        public object GetItem(string key)

        {

            return _dictionary[key];

        }

    }

    public class Logo

    {

        private Cache _cache;

​

        public Logo()

        {

            _cache = new Cache();

        }

​

        public string EncodedPicture { get; set; }

        public async Task<Logo> GetLogo(string key, bool useHttpService = false)

        {

            Logo result;

            if (DateTime.Now.Hour > 0 && DateTime.Now.Hour < 8 && !useHttpService) // Night hours

            {

                result = (Logo)_cache.GetItem(key);

            }

            if (useHttpService)

            {

                var client = new HttpClient {BaseAddress = new Uri("http://logoservice.io/")};

                var response = await client.GetStringAsync("logos/" + key);

                result = new Logo {EncodedPicture = response};

                _cache.SetItem(key, result);

            }

            else

            {

                var connection = new SqlConnection("ServerName=LogoServer;Database=LogosDB");

                var command = new SqlCommand("SELECT EncodedLogo FROM Logos WHERE Id = " + key);

                await connection.OpenAsync();

                var dbResult = await command.ExecuteReaderAsync();

                result = new Logo {EncodedPicture = dbResult.GetString(0)};

            }

​

            return result;

        }

​

        public void Print()

        {

            Console.WriteLine(EncodedPicture);

        }

    }

​

    public class Program

    {

        static async Task Main(string[] args)

        {

            var logo = new Logo();

            var logo2 = await logo.GetLogo("somekey");

            logo2.Print();

        }

    }

}

​