В интерфес логик добавлен необходимый функционал, нужно реализовать

SecuritySystem/SecuritySystemFileImplement/Implements/ShopStorage.cs

@@ -75,100 +75,5 @@ namespace SecuritySystemFileImplement.Implements
             source.SaveShops();
             return shop.GetViewModel;
         }
-
-        public bool SellSecure(ISecureModel model, int count)
-        {
-            var secure = source.Secures.FirstOrDefault(x => x.Id == model.Id);
-
-            if (secure == null)
-            {
-                return false;
-            }
-            var shopSecures = source.Shops.SelectMany(shop => shop.ShopSecures.Where(c => c.Value.Item1.Id == secure.Id));
-            int countStore = 0;
-
-            foreach (var shopSec in shopSecures)
-                countStore += shopSec.Value.Item2;
-
-            if (count > countStore)
-                return false;
-
-            foreach (var shop in source.Shops)
-            {
-                var secures = shop.ShopSecures;
-
-                foreach (var sec in secures.Where(x => x.Value.Item1.Id == secure.Id))
-                {
-                    int min = Math.Min(sec.Value.Item2, count);
-                    secures[sec.Value.Item1.Id] = (sec.Value.Item1, sec.Value.Item2 - min);
-                    count -= min;
-
-                    if (count <= 0)
-                        break;
-                }
-
-                shop.Update(new ShopBindingModel
-                {
-                    Id = shop.Id,
-                    Name = shop.Name,
-                    Address = shop.Address,
-                    MaxSecuresCount = shop.MaxSecuresCount,
-                    OpeningDate = shop.OpeningDate,
-                    ShopSecures = secures
-                });
-
-                source.SaveShops();
-
-                if (count <= 0)
-                    return true;
-            }
-
-            return true;
-        }
-
-        public bool CheckCountSecure(ISecureModel model, int count)
-        {
-            int store = source.Shops.Select(x => x.ShopSecures.Select(y => (y.Value.Item1.Id == model.Id ? y.Value.Item2 : 0)).Sum()).Sum();
-            return store >= count;
-        }
-
-        public bool SellSecures(ISecureModel model, int count)
-        {
-            var secure = source.Secures.FirstOrDefault(x => x.Id == model.Id);
-
-            if (secure == null || !CheckCountSecure(model, count))
-            {
-                throw new ArgumentNullException("В магазинах нет такого количества товара");
-            }
-
-            foreach (var shop in source.Shops)
-            {
-                var secures = shop.ShopSecures;
-                foreach (var elem in secures.Where(x => x.Value.Item1.Id == secure.Id))
-                {
-                    var selling = Math.Min(elem.Value.Item2, count);
-                    secures[elem.Value.Item1.Id] = (elem.Value.Item1, elem.Value.Item2 - selling);
-                    count -= selling;
-
-                    if (count <= 0)
-                    {
-                        break;
-                    }
-                }
-
-                shop.Update(new ShopBindingModel
-                {
-                    Id = model.Id,
-                    Name = shop.Name,
-                    Address = shop.Address,
-                    OpeningDate = shop.OpeningDate,
-                    ShopSecures = secures,
-                    MaxSecuresCount = shop.MaxSecuresCount
-                });
-            }
-
-            source.SaveShops();
-            return true;
-        }
     }
 }