Подправил

GarmentFactory/FormAddTextile.cs

@@ -78,7 +78,7 @@ namespace GarmentFactoryView
             _logger.LogInformation("Пополнение магазина");
             try
             {
-                var operationResult = _logicS.AddTextile(new SupplyBindingModel
+                var operationResult = _logicS.MakeSupply(new SupplyBindingModel
                 {
                     ShopId = Convert.ToInt32(comboBoxShop.SelectedValue),
                     TextileId = Convert.ToInt32(comboBoxTextile.SelectedValue),

GarmentFactory/Program.cs

@@ -38,10 +38,12 @@ namespace GarmentFactory
             services.AddTransient<IComponentStorage, ComponentStorage>();
             services.AddTransient<IOrderStorage, OrderStorage>();
             services.AddTransient<ITextileStorage, TextileStorage>();
+			services.AddTransient<IShopStorage, ShopStorage>();
 
 			services.AddTransient<IComponentLogic, ComponentLogic>();
             services.AddTransient<IOrderLogic, OrderLogic>();
             services.AddTransient<ITextileLogic, TextileLogic>();
+			services.AddTransient<IShopLogic, ShopLogic>();
 
 			services.AddTransient<FormMain>();
             services.AddTransient<FormComponent>();
@@ -50,8 +52,7 @@ namespace GarmentFactory
             services.AddTransient<FormTextile>();
             services.AddTransient<FormTextileComponent>();
             services.AddTransient<FormTextiles>();
-            services.AddTransient<IShopStorage, ShopStorage>();
+            
-            services.AddTransient<IShopLogic, ShopLogic>();
             services.AddTransient<FormShop>();
             services.AddTransient<FormShops>();
             services.AddTransient<FormAddTextile>();

GarmentFactoryBusinessLogic/OrderLogic.cs

@@ -140,6 +140,8 @@ namespace GarmentFactoryBusinessLogic
 			{
 				throw new ArgumentNullException(nameof(order));
 			}
+
+            //Если нельзя пополнить магазины таким кол-вом товаров (не хавтает места), то статус не меняем
 			if (!_shopStorage.RestockShops(new SupplyBindingModel { TextileId = order.TextileId, Count = order.Count }))
 			{
 				throw new ArgumentException("Недостаточно места");

GarmentFactoryBusinessLogic/ShopLogic.cs

@@ -109,7 +109,7 @@ namespace GarmentFactoryBusinessLogic
         }
 
         // Пополнение магазина
-        public bool AddTextile(SupplyBindingModel model)
+        public bool MakeSupply(SupplyBindingModel model)
         {
             if (model == null)
             {
@@ -121,13 +121,23 @@ namespace GarmentFactoryBusinessLogic
                 throw new ArgumentNullException("Количество добавляемых изделий должно быть больше 0");
             }
 
-            var shop = _shopStorage.GetElement(new ShopSearchModel{ Id = model.ShopId });
+			var textile = _textileStorage.GetElement(new TextileSearchModel { Id = model.TextileId });
+			if (textile == null)
+			{
+				throw new ArgumentException($"При добавлении товара в магазин товар с id={model.TextileId} не найден");
+			}
 
+			var shop = _shopStorage.GetElement(new ShopSearchModel { Id = model.ShopId });
 			if (shop == null)
 			{
 				throw new ArgumentException($"При добавлении товара в магазин магазин c id={model.ShopId} не найден");
 			}
 
+            int countTextilesInShop = shop.ShopTextiles.Select(x => x.Value.Item2).Sum();
+
+            //Если в текущий магазин помещается столько товаров
+            if (countTextilesInShop + model.Count <= shop.TextileMaxCount)
+            {
 				// Если такой товар есть, то прибавление переданного кол-ва
 				if (shop.ShopTextiles.ContainsKey(model.TextileId))
 				{
@@ -138,16 +148,24 @@ namespace GarmentFactoryBusinessLogic
 				// Если такого товара нет, то кол-во такого товара равно переданному кол-ву
 				else
 				{
-                var textile = _textileStorage.GetElement(new TextileSearchModel{ Id = model.TextileId });
-                if (textile == null)
-                {
-                    throw new ArgumentException($"При добавлении товара в магазин товар с id={model.TextileId} не найден");
-                }
 					shop.ShopTextiles.Add(model.TextileId, (textile, model.Count));
 				}
+
+                _shopStorage.Update(new()
+                {
+                    Id = shop.Id,
+                    ShopName = shop.ShopName,
+                    Address = shop.Address,
+                    DateOpen = shop.DateOpen,
+                    ShopTextiles = shop.ShopTextiles,
+                    TextileMaxCount = shop.TextileMaxCount,
+                });
 				return true;
 			}
-
+            //Если не поместилось столько товара
+            _logger.LogWarning("Required shop is overflowed");
+            return false;	
+        }
 
         // Проверка данных магазина при добавлении/удалении/обновлении
         private void CheckModel(ShopBindingModel model, bool withParams = true)

GarmentFactoryContracts/BusinessLogicsContracts/IShopLogic.cs

@@ -22,7 +22,7 @@ namespace GarmentFactoryContracts.BusinessLogicsContracts
 
         bool Delete(ShopBindingModel model);
 
-        bool AddTextile(SupplyBindingModel model);
+        bool MakeSupply(SupplyBindingModel model);
 
         bool Sell(SupplySearchModel model);
     }

GarmentFactoryContracts/StoragesContracts/IShopStorage.cs

@@ -17,6 +17,7 @@ namespace GarmentFactoryContracts.StoragesContracts
         ShopViewModel? Insert(ShopBindingModel model);
         ShopViewModel? Update(ShopBindingModel model);
         ShopViewModel? Delete(ShopBindingModel model);
+        //Продажа изделий в нужном кол-ве
 		bool Sell(SupplySearchModel model);
         //Пополнение магаз-ов
         bool RestockShops(SupplyBindingModel model);

GarmentFactoryListImplement/Implements/ShopStorage.cs

@@ -2,6 +2,7 @@
 using GarmentFactoryContracts.SearchModels;
 using GarmentFactoryContracts.StoragesContracts;
 using GarmentFactoryContracts.ViewModels;
+using GarmentFactoryDataModels.Models;
 using GarmentFactoryListImplement.Models;
 using System;
 using System.Collections.Generic;