Confectionery/Confectionery/Program.cs

@@ -5,7 +5,6 @@ using ConfectioneryFileImplement.Implements;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using NLog.Extensions.Logging;
-using PastriesShopBusinessLogic.BusinessLogics;
 namespace ConfectioneryView
 {
     internal static class Program

Confectionery/ConfectioneryBusinessLogic/BusinessLogics/ShopLogic.cs

@@ -5,7 +5,7 @@ using ConfectioneryContracts.StoragesContracts;
 using ConfectioneryContracts.ViewModels;
 using ConfectioneryDataModels.Models;
 using Microsoft.Extensions.Logging;
-namespace PastriesShopBusinessLogic.BusinessLogics
+namespace ConfectioneryBusinessLogic.BusinessLogics
 {
 	public class ShopLogic : IShopLogic
 	{

Confectionery/ConfectioneryFileImplement/Implements/ShopStorage.cs

@@ -77,10 +77,10 @@ namespace ConfectioneryFileImplement.Implements
 		}
 		private bool CheckAvailability(int PastryId, int count)
 		{
-			count -= _source.Shops.Select(
-				x => x.ShopPastries.Select(y => 
-				(y.Value.Item1.Id == PastryId ? 
-				y.Value.Item2 : 0)).Sum()).Sum();
+			count -= _source.Shops
+				.SelectMany(x => x.ShopPastries)
+				.Where(y => y.Value.Item1.Id == PastryId)
+				.Sum(y => y.Value.Item2);
 			return count <= 0;
 		}
 		public bool SellPastries(IPastryModel model, int count)