public class RssFeeds
        {
            [Key]
            public int RssFeedsId { get; set; }

            public string Indeficator { get; set; }
            [Display(Name = "Источник" )]
            public string Source { get; set; }
            [Display(Name = "Название новости")]
            public string TitleNew { get; set; }
            [Display(Name = "Описание новости")]
            public string News { get; set; }
            [Display(Name = "Дата публикации")]
            public string Date { get; set; }
 }

public class DataBaseContext : DbContext
    {

        public DataBaseContext(DbContextOptions<DataBaseContext> options) : base(options)
        {

        }

       public virtual DbSet<RssFeeds> RssFeeds { get; set; }
    }

public class Sorted : ISorted
    {

        public List<RssFeeds> getSortDateHabr()
        {
            List<RssFeeds> list = db.RssFeeds.OrderBy(p => p.Date).Where(m => m.Indeficator == "H").ToList();
            return list;
        }

        public List<RssFeeds> getSortDateInterFax()
        {
            List<RssFeeds> list = db.RssFeeds.OrderBy(p => p.Date).Where(m => m.Indeficator == "I").ToList();
            return list;
        }

        public List<RssFeeds> getSortSourceHabr()
        {
            List<RssFeeds> list = db.RssFeeds.OrderBy(p => p.Source).Where(m => m.Indeficator == "H").ToList();
            return list;
        }

        public List<RssFeeds> getSortSourceInterFax()
        {
            List<RssFeeds> list = db.RssFeeds.OrderBy(p => p.Source).Where(m => m.Indeficator == "I").ToList();
            return list;
        }

        public List<RssFeeds> getSortSDateAll()
        {
            List<RssFeeds> list = db.RssFeeds.OrderBy(p => p.Date).ToList();
            return list;
        }

        public List<RssFeeds> getSortSourceAll()
        {
            List<RssFeeds> list = db.RssFeeds.OrderBy(p => p.Source).ToList();
            return list;
        }

    }