var AnonymusData = DataContext.Table1
          .Join(DataContext.Table2,
              c => c.Id,
              cm => cm.IdAlbom,
              (c, cm) => new
              {
                  IdObj = c.Id,
                  UserId = c.UserId,
                  Name = c.Name,
                  inCountry = c.inCountry,
                  inCity = c.inCity,
                  Date = c.Date,
                  description = c.description,
                  recommendations = c.recommendations,
                  transport = c.transport,
                  Photos = c.Photos,
                  PhotosChild = c.PhotosChild,
                 // OnSubscr = cm.IdAlbom,
                  PhotosCount = c.Photos.Count,
              }).
          Where(c => c.UserId == IdUser).// ошибка, нужно указать TAble2.WhoTakeAlbom = IdUser
          Where(x => x.PhotosCount > 0).
          OrderByDescending(x => x.IdObj).ToList();