The entity or complex type 'PWS.DataLayer.Context.Tag' cannot be constructed in a LINQ to Entities query.

return tags.Cacheable(x => x.Select(item => new Tag
            {
                Id = item.Id,
                ArticlesCount = item.Articles.Count(),
                Name = item.Name,
                CreatedBy = item.CreatedBy,
                CreatedOn = item.CreatedOn,
                ModifiedBy = item.ModifiedBy,
                ModifiedOn = item.ModifiedOn
            })).ToList();

This is the last installment in a series of videos made with the Entity Framework team. In this episode Brice Lambson describes migrations and how they are used in Entity Framework 7.