11 changed files with 603 additions and 5 deletions
--- a/Pizzeria/Pizzeria.sln
+++ b/Pizzeria/Pizzeria.sln
@ -5,13 +5,15 @@ VisualStudioVersion = 17.7.34024.191
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PizzeriaView", "PizzeriaView\PizzeriaView.csproj", "{C3B647C4-306F-43B5-BDF2-FF5F3A34364F}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PizzeriaBusinessLogic", "PizzeriaBusinessLogic\PizzeriaBusinessLogic.csproj", "{906C7D67-BBCC-48D7-BB34-62A9A35779A8}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PizzeriaBusinessLogic", "PizzeriaBusinessLogic\PizzeriaBusinessLogic.csproj", "{906C7D67-BBCC-48D7-BB34-62A9A35779A8}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PizzeriaContracts", "PizzeriaContracts\PizzeriaContracts.csproj", "{A625183B-6EEA-4995-B06D-E10835CEFE9C}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PizzeriaContracts", "PizzeriaContracts\PizzeriaContracts.csproj", "{A625183B-6EEA-4995-B06D-E10835CEFE9C}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PizzeriaDataModels", "PizzeriaDataModels\PizzeriaDataModels.csproj", "{D0318436-6887-4AD1-92B2-19A7F37240DC}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PizzeriaDataModels", "PizzeriaDataModels\PizzeriaDataModels.csproj", "{D0318436-6887-4AD1-92B2-19A7F37240DC}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PizzeriaListImplement", "PizzeriaListImplement\PizzeriaListImplement.csproj", "{190E2EDD-BFA6-4213-9F8A-1B1D4FBBB8E4}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PizzeriaListImplement", "PizzeriaListImplement\PizzeriaListImplement.csproj", "{190E2EDD-BFA6-4213-9F8A-1B1D4FBBB8E4}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PizzeriaFileImplement", "PizzeriaFileImplement\PizzeriaFileImplement.csproj", "{678CE6E1-EEBF-4D54-AFCA-B1DEAF300C88}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@ -39,6 +41,10 @@ Global
 		{190E2EDD-BFA6-4213-9F8A-1B1D4FBBB8E4}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{190E2EDD-BFA6-4213-9F8A-1B1D4FBBB8E4}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{190E2EDD-BFA6-4213-9F8A-1B1D4FBBB8E4}.Release|Any CPU.Build.0 = Release|Any CPU
+		{678CE6E1-EEBF-4D54-AFCA-B1DEAF300C88}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{678CE6E1-EEBF-4D54-AFCA-B1DEAF300C88}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{678CE6E1-EEBF-4D54-AFCA-B1DEAF300C88}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{678CE6E1-EEBF-4D54-AFCA-B1DEAF300C88}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
--- a/Pizzeria/PizzeriaFileImplement/DataFileSingleton.cs
+++ b/Pizzeria/PizzeriaFileImplement/DataFileSingleton.cs
@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PizzeriaFileImplement.Models;
+using System.Xml.Linq;
+
+namespace PizzeriaFileImplement
+{
+    public class DataFileSingleton
+    {
+        private static DataFileSingleton? instance;
+        private readonly string ComponentFileName = "Component.xml";
+        private readonly string OrderFileName = "Order.xml";
+        private readonly string PizzaFileName = "Pizza.xml";
+        public List<Component> Components { get; private set; }
+        public List<Order> Orders { get; private set; }
+        public List<Pizza> Pizzas { get; private set; }
+
+        public static DataFileSingleton GetInstance()
+        {
+            if (instance == null)
+            {
+                instance = new DataFileSingleton();
+            }
+            return instance;
+        }
+
+        public void SaveComponents() => SaveData(Components, ComponentFileName, "Components", x => x.GetXElement);
+        public void SavePizzas() => SaveData(Pizzas, PizzaFileName, "Pizzas", x => x.GetXElement);
+        public void SaveOrders() => SaveData(Orders, OrderFileName, "Orders", x => x.GetXElement);
+
+        private DataFileSingleton()
+        {
+            Components = LoadData(ComponentFileName, "Component", x => Component.Create(x)!)!;
+            Pizzas = LoadData(PizzaFileName, "Pizza", x => Pizza.Create(x)!)!;
+            Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
+        }
+
+        private static List<T>? LoadData<T>(string filename, string xmlNodeName, Func<XElement, T> selectFunction)
+        {
+            if (File.Exists(filename))
+            {
+                return XDocument.Load(filename)?.Root?.Elements(xmlNodeName)?.Select(selectFunction)?.ToList();
+            }
+            return new List<T>();
+        }
+
+        private static void SaveData<T>(List<T> data, string filename, string xmlNodeName, Func<T, XElement> selectFunction)
+        {
+            if (data != null)
+            {
+                new XDocument(new XElement(xmlNodeName, data.Select(selectFunction).ToArray())).Save(filename);
+            }
+        }
+    }
+}
--- a/Pizzeria/PizzeriaFileImplement/Implements/ComponentStorage.cs
+++ b/Pizzeria/PizzeriaFileImplement/Implements/ComponentStorage.cs
@ -0,0 +1,86 @@
+using PizzeriaContracts.BindingModels;
+using PizzeriaContracts.SearchModels;
+using PizzeriaContracts.StoragesContracts;
+using PizzeriaContracts.ViewModels;
+using PizzeriaFileImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PizzeriaFileImplement.Implements
+{
+    public class ComponentStorage : IComponentStorage
+    {
+        private readonly DataFileSingleton source;
+
+        public ComponentStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+
+        public List<ComponentViewModel> GetFullList()
+        {
+            return source.Components.Select(x => x.GetViewModel).ToList();
+        }
+
+        public List<ComponentViewModel> GetFilteredList(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName))
+            {
+                return new();
+            }
+            return source.Components.Where(x => x.ComponentName.Contains(model.ComponentName)).Select(x => x.GetViewModel).ToList();
+        }
+
+        public ComponentViewModel? GetElement(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return source.Components.FirstOrDefault(x =>
+            (!string.IsNullOrEmpty(model.ComponentName) && x.ComponentName == model.ComponentName) ||
+            (model.Id.HasValue && x.Id == model.Id))
+                ?.GetViewModel;
+        }
+
+        public ComponentViewModel? Insert(ComponentBindingModel model)
+        {
+            model.Id = source.Components.Count > 0 ? source.Components.Max(x => x.Id) + 1 : 1;
+            var newComponent = Component.Create(model);
+            if (newComponent == null)
+            {
+                return null;
+            }
+            source.Components.Add(newComponent);
+            source.SaveComponents();
+            return newComponent.GetViewModel;
+        }
+
+        public ComponentViewModel? Update(ComponentBindingModel model)
+        {
+            var component = source.Components.FirstOrDefault(x => x.Id == model.Id);
+            if (component == null)
+            {
+                return null;
+            }
+            component.Update(model);
+            source.SaveComponents();
+            return component.GetViewModel;
+        }
+
+        public ComponentViewModel? Delete(ComponentBindingModel model)
+        {
+            var element = source.Components.FirstOrDefault(x => x.Id == model.Id);
+            if (element != null)
+            {
+                source.Components.Remove(element);
+                source.SaveComponents();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}
--- a/Pizzeria/PizzeriaFileImplement/Implements/OrderStorage.cs
+++ b/Pizzeria/PizzeriaFileImplement/Implements/OrderStorage.cs
@ -0,0 +1,94 @@
+using PizzeriaContracts.BindingModels;
+using PizzeriaContracts.SearchModels;
+using PizzeriaContracts.StoragesContracts;
+using PizzeriaContracts.ViewModels;
+using PizzeriaFileImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PizzeriaFileImplement.Implements
+{
+    public class OrderStorage : IOrderStorage
+    {
+        private readonly DataFileSingleton source;
+
+        public OrderStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+
+        public List<OrderViewModel> GetFullList() => source.Orders.Select(x => AttachPizzaName(x.GetViewModel)).ToList();
+
+        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return new();
+            }
+            return source.Orders.Where(x => x.Id == model.Id).Select(x => AttachPizzaName(x.GetViewModel)).ToList();
+        }
+
+        public OrderViewModel? GetElement(OrderSearchModel model)
+        {
+            if (!model.Id.HasValue)
+            {
+                return new();
+            }
+            return AttachPizzaName(source.Orders.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel);
+        }
+
+        public OrderViewModel? Insert(OrderBindingModel model)
+        {
+            model.Id = source.Orders.Count > 0 ? source.Orders.Max(x => x.Id) + 1 : 1;
+            var newOrder = Order.Create(model);
+            if (newOrder == null)
+            {
+                return null;
+            }
+            source.Orders.Add(newOrder);
+            source.SaveOrders();
+            return AttachPizzaName(newOrder.GetViewModel);
+        }
+
+        public OrderViewModel? Update(OrderBindingModel model)
+        {
+            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (order == null)
+            {
+                return null;
+            }
+            order.Update(model);
+            source.SaveOrders();
+            return AttachPizzaName(order.GetViewModel);
+        }
+
+        public OrderViewModel? Delete(OrderBindingModel model)
+        {
+            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
+            if (order != null)
+            {
+                source.Orders.Remove(order);
+                source.SaveOrders();
+                return AttachPizzaName(order.GetViewModel);
+            }
+            return null;
+        }
+
+        private OrderViewModel? AttachPizzaName(OrderViewModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            var pizza = source.Pizzas.FirstOrDefault(x => x.Id == model.PizzaId);
+            if (pizza != null)
+            {
+                model.PizzaName = pizza.PizzaName;
+            }
+            return model;
+        }
+    }
+}
--- a/Pizzeria/PizzeriaFileImplement/Implements/PizzaStorage.cs
+++ b/Pizzeria/PizzeriaFileImplement/Implements/PizzaStorage.cs
@ -0,0 +1,86 @@
+using PizzeriaContracts.BindingModels;
+using PizzeriaContracts.SearchModels;
+using PizzeriaContracts.StoragesContracts;
+using PizzeriaContracts.ViewModels;
+using PizzeriaFileImplement.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PizzeriaFileImplement.Implements
+{
+    public class PizzaStorage : IPizzaStorage
+    {
+        private readonly DataFileSingleton source;
+
+        public PizzaStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+
+        public List<PizzaViewModel> GetFullList()
+        {
+            return source.Pizzas.Select(x => x.GetViewModel).ToList();
+        }
+
+        public List<PizzaViewModel> GetFilteredList(PizzaSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.PizzaName))
+            {
+                return new();
+            }
+            return source.Pizzas.Where(x => x.PizzaName.Contains(model.PizzaName)).Select(x => x.GetViewModel).ToList();
+        }
+
+        public PizzaViewModel? GetElement(PizzaSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.PizzaName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return source.Pizzas.FirstOrDefault(x =>
+            (!string.IsNullOrEmpty(model.PizzaName) && x.PizzaName == model.PizzaName) ||
+            (model.Id.HasValue && x.Id == model.Id))
+                ?.GetViewModel;
+        }
+
+        public PizzaViewModel? Insert(PizzaBindingModel model)
+        {
+            model.Id = source.Pizzas.Count > 0 ? source.Pizzas.Max(x => x.Id) + 1 : 1;
+            var newPizza = Pizza.Create(model);
+            if (newPizza == null)
+            {
+                return null;
+            }
+            source.Pizzas.Add(newPizza);
+            source.SavePizzas();
+            return newPizza.GetViewModel;
+        }
+
+        public PizzaViewModel? Update(PizzaBindingModel model)
+        {
+            var Pizza = source.Pizzas.FirstOrDefault(x => x.Id == model.Id);
+            if (Pizza == null)
+            {
+                return null;
+            }
+            Pizza.Update(model);
+            source.SavePizzas();
+            return Pizza.GetViewModel;
+        }
+
+        public PizzaViewModel? Delete(PizzaBindingModel model)
+        {
+            var Pizza = source.Pizzas.FirstOrDefault(x => x.Id == model.Id);
+            if (Pizza != null)
+            {
+                source.Pizzas.Remove(Pizza);
+                source.SavePizzas();
+                return Pizza.GetViewModel;
+            }
+            return null;
+        }
+    }
+}
--- a/Pizzeria/PizzeriaFileImplement/Models/Component.cs
+++ b/Pizzeria/PizzeriaFileImplement/Models/Component.cs
@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using PizzeriaContracts.BindingModels;
+using PizzeriaContracts.ViewModels;
+using PizzeriaDataModels.Models;
+using System.Xml.Linq;
+
+namespace PizzeriaFileImplement.Models
+{
+    public class Component : IComponentModel
+    {
+        public int Id { get; private set; }
+        public string ComponentName { get; private set; } = string.Empty;
+        public double Cost { get; set; }
+
+        public static Component? Create(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = model.Id,
+                ComponentName = model.ComponentName,
+                Cost = model.Cost
+            };
+        }
+
+        public static Component? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                ComponentName = element.Element("ComponentName")!.Value,
+                Cost = Convert.ToDouble(element.Element("Cost")!.Value)
+            };
+        }
+
+        public void Update(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ComponentName = model.ComponentName;
+            Cost = model.Cost;
+        }
+
+        public ComponentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComponentName = ComponentName,
+            Cost = Cost
+        };
+
+        public XElement GetXElement => new("Component",
+                    new XAttribute("Id", Id),
+                    new XElement("ComponentName", ComponentName),
+                    new XElement("Cost", Cost.ToString()));
+    }
+}
--- a/Pizzeria/PizzeriaFileImplement/Models/Order.cs
+++ b/Pizzeria/PizzeriaFileImplement/Models/Order.cs
@ -0,0 +1,92 @@
+using PizzeriaContracts.BindingModels;
+using PizzeriaContracts.ViewModels;
+using PizzeriaDataModels.Enums;
+using PizzeriaDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+
+namespace PizzeriaFileImplement.Models
+{
+    public class Order : IOrderModel
+    {
+        public int Id { get; private set; }
+        public int PizzaId { get; private set; }
+        public int Count { get; private set; }
+        public double Sum { get; private set; }
+        public OrderStatus Status { get; private set; } = OrderStatus.Неизвестен;
+        public DateTime DateCreate { get; private set; } = DateTime.Now;
+        public DateTime? DateImplement { get; private set; }
+
+        public static Order? Create(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Order()
+            {
+                Id = model.Id,
+                PizzaId = model.PizzaId,
+                Count = model.Count,
+                Sum = model.Sum,
+                Status = model.Status,
+                DateCreate = model.DateCreate,
+                DateImplement = model.DateImplement,
+            };
+        }
+
+        public static Order? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            string dateImplement = element.Element("DateImplement")!.Value;
+            return new Order()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                PizzaId = Convert.ToInt32(element.Element("PizzaId")!.Value),
+                Count = Convert.ToInt32(element.Element("Count")!.Value),
+                Sum = Convert.ToDouble(element.Element("Sum")!.Value),
+                Status = (OrderStatus)(Enum.Parse(typeof(OrderStatus), element.Element("Status")!.Value)),
+                DateCreate = Convert.ToDateTime(element.Element("DateCreate")!.Value),
+                DateImplement = (dateImplement == "" || dateImplement is null) ? Convert.ToDateTime(null) : Convert.ToDateTime(dateImplement)
+            };
+
+        }
+
+        public void Update(OrderBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            Status = model.Status;
+            if (model.Status == OrderStatus.Выдан) DateImplement = model.DateImplement;
+        }
+
+        public OrderViewModel GetViewModel => new()
+        {
+            Id = Id,
+            PizzaId = PizzaId,
+            Count = Count,
+            Sum = Sum,
+            Status = Status,
+            DateCreate = DateCreate,
+            DateImplement = DateImplement,
+        };
+
+        public XElement GetXElement => new("Order",
+           new XAttribute("Id", Id),
+           new XElement("PizzaId", PizzaId.ToString()),
+           new XElement("Count", Count.ToString()),
+           new XElement("Sum", Sum.ToString()),
+           new XElement("Status", Status.ToString()),
+           new XElement("DateCreate", DateCreate.ToString()),
+           new XElement("DateImplement", DateImplement.ToString()));
+    }
+}
--- a/Pizzeria/PizzeriaFileImplement/Models/Pizza.cs
+++ b/Pizzeria/PizzeriaFileImplement/Models/Pizza.cs
@ -0,0 +1,92 @@
+using PizzeriaContracts.BindingModels;
+using PizzeriaContracts.ViewModels;
+using PizzeriaDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+
+namespace PizzeriaFileImplement.Models
+{
+    public class Pizza : IPizzaModel
+    {
+        public int Id { get; private set; }
+        public string PizzaName { get; private set; } = string.Empty;
+        public double Price { get; private set; }
+        public Dictionary<int, int> Components { get; private set; } = new();
+        private Dictionary<int, (IComponentModel, int)>? _pizzaComponents = null;
+
+        public Dictionary<int, (IComponentModel, int)> PizzaComponents
+        {
+            get
+            {
+                if (_pizzaComponents == null)
+                {
+                    var source = DataFileSingleton.GetInstance();
+                    _pizzaComponents = Components.ToDictionary(x => x.Key, y => ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!, y.Value));
+                }
+                return _pizzaComponents;
+            }
+        }
+
+        public static Pizza? Create(PizzaBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Pizza()
+            {
+                Id = model.Id,
+                PizzaName = model.PizzaName,
+                Price = model.Price,
+                Components = model.PizzaComponents.ToDictionary(x => x.Key, x => x.Value.Item2)
+            };
+        }
+
+        public static Pizza? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Pizza()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                PizzaName = element.Element("PizzaName")!.Value,
+                Price = Convert.ToDouble(element.Element("Price")!.Value),
+                Components = element.Element("PizzaComponents")!.Elements("PizzaComponent").ToDictionary(x => Convert.ToInt32(x.Element("Key")?.Value),
+                x => Convert.ToInt32(x.Element("Value")?.Value))
+            };
+        }
+
+        public void Update(PizzaBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            PizzaName = model.PizzaName;
+            Price = model.Price;
+            Components = model.PizzaComponents.ToDictionary(x => x.Key, x => x.Value.Item2);
+            _pizzaComponents = null;
+        }
+
+        public PizzaViewModel GetViewModel => new()
+        {
+            Id = Id,
+            PizzaName = PizzaName,
+            Price = Price,
+            PizzaComponents = PizzaComponents
+        };
+
+        public XElement GetXElement => new("Pizza",
+                new XAttribute("Id", Id),
+                new XElement("PizzaName", PizzaName),
+                new XElement("Price", Price.ToString()),
+                new XElement("PizzaComponents", Components.Select(
+                    x => new XElement("PizzaComponent", new XElement("Key", x.Key), new XElement("Value", x.Value))).ToArray()));
+    }
+}
--- a/Pizzeria/PizzeriaFileImplement/PizzeriaFileImplement.csproj
+++ b/Pizzeria/PizzeriaFileImplement/PizzeriaFileImplement.csproj
@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\PizzeriaContracts\PizzeriaContracts.csproj" />
+    <ProjectReference Include="..\PizzeriaDataModels\PizzeriaDataModels.csproj" />
+  </ItemGroup>
+
+</Project>
--- a/Pizzeria/PizzeriaView/PizzeriaView.csproj
+++ b/Pizzeria/PizzeriaView/PizzeriaView.csproj
@ -28,6 +28,7 @@
  <ItemGroup>
    <ProjectReference Include="..\PizzeriaBusinessLogic\PizzeriaBusinessLogic.csproj" />
    <ProjectReference Include="..\PizzeriaContracts\PizzeriaContracts.csproj" />
+    <ProjectReference Include="..\PizzeriaFileImplement\PizzeriaFileImplement.csproj" />
    <ProjectReference Include="..\PizzeriaListImplement\PizzeriaListImplement.csproj" />
  </ItemGroup>

--- a/Pizzeria/PizzeriaView/Program.cs
+++ b/Pizzeria/PizzeriaView/Program.cs
@ -4,7 +4,7 @@ using NLog.Extensions.Logging;
 using PizzeriaBusinessLogic.BusinessLogics;
 using PizzeriaContracts.BusinessLogicsContracts;
 using PizzeriaContracts.StoragesContracts;
-using PizzeriaListImplement.Implements;
+using PizzeriaFileImplement.Implements;
 using PizzeriaView;

 namespace Pizzeria