crawler.cs

using (var db = new NewsContext())
{
	while (true)
	{
		XmlReader Reader = XmlReader.Create(original.Url);
		SyndicationFeed Feed = SyndicationFeed.Load(Reader);

		int totalNewAdded = 0;

		foreach (SyndicationItem FeedItem in Feed.Items)
		{
			News item = new News();
			item.Original = FeedItem.Links.First().Uri.OriginalString;
			//...

			try
			{
				HtmlWeb webget = new HtmlWeb();
				HtmlDocument doc = webget.Load(item.Original);
				// тут дергается источник
			}
			catch (System.Net.WebException wex) {
				//...
			}

			db.News.Add(item);

			try
			{
				db.SaveChanges();
				totalNewAdded++;
			} catch (Exception ex) { }
		}

		if (totalNewAdded > 0)
		{
			Console.WriteLine("New posts added: {0} from {1}", totalNewAdded, original.Url);
		}

		Feed = null;
		Reader = null;

		Thread.Sleep(60000);
	}
}