public static void AddChannelsToDatabase(string websiteUrl)
        {
            var            channelTitles = FeedParserHelper.GetChannelTitles(websiteUrl);
            var            channelUrls   = FeedParserHelper.GetChannelUrls(websiteUrl);
            List <Channel> channelsToAdd = new List <Channel>();
            bool           checker;

            using (var context = new RSSFeedDatabaseModel())
            {
                for (int i = 0; i < channelUrls.Count; i++)
                {
                    checker = IsChannelInDatabase(channelUrls[i]);
                    if (checker == true)
                    {
                        continue;
                    }
                    else
                    {
                        channelsToAdd.Add(new Channel
                        {
                            Address = channelUrls[i],
                            Title   = channelTitles[i]
                        });
                    }
                }
                if (channelsToAdd.Count != 0)
                {
                    context.Channel.AddRange(channelsToAdd);
                    context.SaveChanges();
                }
            }
        }
        public static void AddFeedsToDatabase()
        {
            List <Feed> feedsToAdd = new List <Feed>();

            using (var context = new RSSFeedDatabaseModel())
            {
                foreach (var channel in context.Channel)
                {
                    feedsToAdd = FeedParserHelper.ParseFeed(channel.Address);
                    if (feedsToAdd != null)
                    {
                        for (int i = feedsToAdd.Count - 1; i >= 0; i--)
                        {
                            channel.Feed.Add(feedsToAdd[i]);
                        }
                        feedsToAdd.Clear();
                    }
                }
                context.SaveChanges();
            }
        }