// атрибуты Diet добавить при изминении update diet public static void UpdateDiet(this Diet newdiet, int[] arr) { using (var db = new GoodFit()) { Diet diet = db.Diet.FirstOrDefault(j => j.Id == newdiet.Id); diet.Name = newdiet.Name; diet.Subscription = newdiet.Subscription; diet.Description = newdiet.Description; if (arr.Length == 0) { db.Diet.FirstOrDefault(j => j.Id == newdiet.Id).Dish.Clear(); db.SaveChanges(); return; } foreach (var item in diet.Dish.ToList()) { if (arr.Contains(item.id)) { } else { db.Diet.FirstOrDefault(j => j.Id == newdiet.Id).Dish.Remove(db.Dish.FirstOrDefault(i => i.id == item.id)); } } db.SaveChanges(); diet.AddDishes(arr); db.SaveChanges(); } //db.Entry(diet).State = EntityState.Modified; //diet.Dish.Clear(); // db.Diet.FirstOrDefault(j => j.Id == diet.Id) }