добавила DataContract на классы-модели и DataMember на свойства этих классов для хранения в файлах и в бд

SushiBarContracts/BindingModel/BackUpSaveBinidngModel.cs

@@ -0,0 +1,7 @@
+namespace SushiBarContracts.BindingModel
+{
+    public class BackUpSaveBinidngModel
+    {
+        public string FolderName { get; set; } = string.Empty;
+    }
+}

SushiBarContracts/BusinessLogicsContracts/IBackUpLogic.cs

@@ -0,0 +1,9 @@
+using SushiBarContracts.BindingModel;
+
+namespace SushiBarContracts.BusinessLogicsContracts
+{
+    public interface IBackUpLogic
+    {
+        void CreateBackUp(BackUpSaveBinidngModel model);
+    }
+}

SushiBarContracts/StoragesContracts/IBackUpInfo.cs

@@ -0,0 +1,8 @@
+namespace SushiBarContracts.StoragesContracts
+{
+    public interface IBackUpInfo
+    {
+        List<T>? GetList<T>() where T : class, new();
+        Type? GetTypeByModelInterface(string modelInterfaceName);
+    }
+}

SushiBarDatabaseImplement/Implements/BackUpInfo.cs

@@ -0,0 +1,27 @@
+using SushiBarContracts.StoragesContracts;
+
+namespace SushiBarDatabaseImplement.Implements
+{
+    public class BackUpInfo : IBackUpInfo
+    {
+        public List<T>? GetList<T>() where T : class, new()
+        {
+            using var context = new SushiBarDatabase();
+            return context.Set<T>().ToList();
+        }
+        public Type? GetTypeByModelInterface(string modelInterfaceName)
+        {
+            var assembly = typeof(BackUpInfo).Assembly;
+            var types = assembly.GetTypes();
+            foreach (var type in types)
+            {
+                if (type.IsClass &&
+                type.GetInterface(modelInterfaceName) != null)
+                {
+                    return type;
+                }
+            }
+            return null;
+        }
+    }
+}

SushiBarDatabaseImplement/Models/Client.cs

@@ -3,24 +3,28 @@ using SushiBarContracts.ViewModels;
 using System.ComponentModel.DataAnnotations.Schema;
 using System.ComponentModel.DataAnnotations;
 using SushiBarDataModels;
+using System.Runtime.Serialization;
 
 namespace SushiBarDatabaseImplement.Models
 {
+    [DataContract]
     public class Client : IClientModel
     {
+        [DataMember]
         public int Id { get; private set; }
 
+        [DataMember]
         [Required]
         public string ClientFIO { get; private set; } = string.Empty;
 
+        [DataMember]
         [Required]
         public string Email { get; private set; } = string.Empty;
 
+        [DataMember]
         [Required]
         public string Password { get; private set; } = string.Empty;
 
-        [Required]
-
         [ForeignKey("ClientId")]
         public virtual List<Order> Orders { get; set; } = new();
 

SushiBarDatabaseImplement/Models/Component.cs

@@ -3,16 +3,24 @@ using System.ComponentModel.DataAnnotations;
 using SushiBarDataModels.Models;
 using SushiBarContracts.BindingModel;
 using SushiBarContracts.ViewModels;
+using System.Runtime.Serialization;
 
 namespace SushiBarDatabaseImplement.Models
 {
+    [DataContract]
     public class Component : IComponentModel
     {
+        [DataMember]
         public int Id { get; private set; }
+
+        [DataMember]
         [Required]
         public string ComponentName { get; private set; } = string.Empty;
+
+        [DataMember]
         [Required]
         public double Cost { get; set; }
+
         [ForeignKey("ComponentId")]
         public virtual List<SushiComponent> SushiComponents { get; set; } = new();
         public static Component? Create(ComponentBindingModel model)

SushiBarDatabaseImplement/Models/Implementer.cs

@@ -1,33 +1,34 @@
 using SushiBarContracts.BindingModel;
 using SushiBarContracts.ViewModels;
 using SushiBarDataModels;
-using System;
-using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations.Schema;
 using System.ComponentModel.DataAnnotations;
-using System.Linq;
+using System.Runtime.Serialization;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace SushiBarDatabaseImplement.Models
 {
+    [DataContract]
     public class Implementer : IImplementerModel
     {
+        [DataMember]
         public int Id { get; private set; }
 
+        [DataMember]
         [Required]
         public string ImplementerFIO { get; private set; } = string.Empty;
 
+        [DataMember]
         [Required]
         public string Password { get; private set; } = string.Empty;
 
+        [DataMember]
         [Required]
         public int WorkExperience { get; private set; }
 
+        [DataMember]
         [Required]
         public int Qualification { get; private set; }
 
-        [Required]
         [ForeignKey("ImplementerId")]
         public virtual List<Order> Orders { get; set; } = new();
 

SushiBarDatabaseImplement/Models/MessageInfo.cs

@@ -2,25 +2,33 @@
 using SushiBarContracts.ViewModels;
 using SushiBarDataModels;
 using System.ComponentModel.DataAnnotations;
+using System.Runtime.Serialization;
 
 namespace SushiBarDatabaseImplement.Models
 {
+    [DataContract]
     public class MessageInfo : IMessageInfoModel
     {
+        [DataMember]
         [Key]
         public string MessageId { get; set; } = string.Empty;
 
+        [DataMember]
         public int? ClientId { get; set; }
 
+        [DataMember]
         [Required]
         public string SenderName { get; set; } = string.Empty;
 
+        [DataMember]
         [Required]
         public DateTime DateDelivery { get; set; } = DateTime.Now;
 
+        [DataMember]
         [Required]
         public string Subject { get; set; } = string.Empty;
 
+        [DataMember]
         [Required]
         public string Body { get; set; } = string.Empty;
 

SushiBarDatabaseImplement/Models/Order.cs

@@ -3,33 +3,46 @@ using SushiBarContracts.ViewModels;
 using SushiBarDataModels;
 using SushiBarDataModels.Enums;
 using System.ComponentModel.DataAnnotations;
+using System.Runtime.Serialization;
 
 namespace SushiBarDatabaseImplement.Models
 {
+    [DataContract]
     public class Order : IOrderModel
     {
+        [DataMember]
         public int Id { get; set; }
 
+        [DataMember]
         [Required]
         public int SushiId { get; set; }
 
+        [DataMember]
         [Required]
         public int ClientId { get; set; }
 
+        [DataMember]
         public int? ImplementerId { get; set; }
 
+        [DataMember]
         [Required]
         public int Count { get; set; }
 
+        [DataMember]
         [Required]
         public double Sum { get; set; }
 
+        [DataMember]
         [Required]
         public OrderStatus Status { get; set; } = OrderStatus.Неизвестен;
 
+        [DataMember]
         [Required]
         public DateTime DateCreate { get; set; } = DateTime.Now;
+
+        [DataMember]
         public DateTime? DateImplement { get; set; }
+
         public virtual Client? Client { get; set; }
         public virtual Implementer? Implementer { get; set; }
         public virtual Sushi? Sushi { get; set; }

SushiBarDatabaseImplement/Models/Sushi.cs

@@ -3,18 +3,28 @@ using System.ComponentModel.DataAnnotations.Schema;
 using System.ComponentModel.DataAnnotations;
 using SushiBarContracts.BindingModel;
 using SushiBarContracts.ViewModels;
+using System.Runtime.Serialization;
 
 
 namespace SushiBarDatabaseImplement.Models
 {
+    [DataContract]
     public class Sushi : ISushiModel
     {
+        [DataMember]
         public int Id { get; set; }
+
+        [DataMember]
         [Required]
         public string SushiName { get; set; } = string.Empty;
+
+        [DataMember]
         [Required]
         public double Price { get; set; }
+
         private Dictionary<int, (IComponentModel, int)>? _sushiComponents = null;
+        
+        [DataMember]
         [NotMapped]
         public Dictionary<int, (IComponentModel, int)> SushiComponents
         {

SushiBarDatabaseImplement/Models/SushiComponent.cs

@@ -1,18 +1,29 @@
 using System.ComponentModel.DataAnnotations;
+using System.Runtime.Serialization;
 
 
 namespace SushiBarDatabaseImplement.Models
 {
+    [DataContract]
     public class SushiComponent
     {
+        [DataMember]
         public int Id { get; set; }
+
+        [DataMember]
         [Required]
         public int SushiId { get; set; }
+
+        [DataMember]
         [Required]
         public int ComponentId { get; set; }
+
+        [DataMember]
         [Required]
         public int Count { get; set; }
+
         public virtual Component Component { get; set; } = new();
+
         public virtual Sushi Sushi { get; set; } = new();
 
     }

SushiBarFileImplement/Implements/BackUpInfo.cs

@@ -0,0 +1,40 @@
+using SushiBarContracts.StoragesContracts;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SushiBarFileImplement.Implements
+{
+    public class BackUpInfo : IBackUpInfo
+    {
+        private readonly DataFileSingleton _fileSingleton;
+
+        public BackUpInfo()
+        {
+            _fileSingleton = DataFileSingleton.GetInstance();
+        }
+
+        public List<T>? GetList<T>() where T : class, new()
+        {
+            return (List<T>?)_fileSingleton.GetType().GetProperties()
+                 .FirstOrDefault(x => x.PropertyType.IsGenericType && x.PropertyType.GetGenericArguments()[0] == typeof(T))
+                 ?.GetValue(_fileSingleton);
+        }
+        public Type? GetTypeByModelInterface(string modelInterfaceName)
+        {
+            var assembly = typeof(BackUpInfo).Assembly;
+            var types = assembly.GetTypes();
+            foreach (var type in types)
+            {
+                if (type.IsClass &&
+                type.GetInterface(modelInterfaceName) != null)
+                {
+                    return type;
+                }
+            }
+            return null;
+        }
+    }
+}

SushiBarFileImplement/Models/Client.cs

@@ -1,15 +1,24 @@
 using SushiBarContracts.BindingModel;
 using SushiBarContracts.ViewModels;
 using SushiBarDataModels;
+using System.Runtime.Serialization;
 using System.Xml.Linq;
 
 namespace SushiBarFileImplement.Models
 {
+    [DataContract]
     public class Client : IClientModel
     {
+        [DataMember]
         public int Id { get; private set; }
+
+        [DataMember]
         public string ClientFIO { get; private set; } = string.Empty;
+
+        [DataMember]
         public string Email { get; private set; } = string.Empty;
+
+        [DataMember]
         public string Password { get; private set; } = string.Empty;
         public static Client? Create(ClientBindingModel model)
         {

SushiBarFileImplement/Models/Component.cs

@@ -1,14 +1,21 @@
 using SushiBarContracts.BindingModel;
 using SushiBarContracts.ViewModels;
 using SushiBarDataModels.Models;
+using System.Runtime.Serialization;
 using System.Xml.Linq;
 
 namespace SushiBarFileImplement.Models
 {
+    [DataContract]
     public class Component : IComponentModel
     {
+        [DataMember]
         public int Id { get; private set; }
+
+        [DataMember]
         public string ComponentName { get; private set; } = string.Empty;
+
+        [DataMember]
         public double Cost { get; set; }
         public static Component? Create(ComponentBindingModel model)
         {

SushiBarFileImplement/Models/Implementer.cs

@@ -4,18 +4,29 @@ using SushiBarDataModels;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Runtime.Serialization;
 using System.Text;
 using System.Threading.Tasks;
 using System.Xml.Linq;
 
 namespace SushiBarFileImplement.Models
 {
+    [DataContract]
     public class Implementer : IImplementerModel
     {
+        [DataMember]
         public int Id { get; private set; }
+
+        [DataMember]
         public string ImplementerFIO { get; private set; } = string.Empty;
+
+        [DataMember]
         public string Password { get; private set; } = string.Empty;
+
+        [DataMember]
         public int WorkExperience { get; private set; }
+
+        [DataMember]
         public int Qualification { get; private set; }
         public static Implementer? Create(ImplementerBindingModel model)
         {

SushiBarFileImplement/Models/MessageInfo.cs

@@ -1,22 +1,30 @@
 using SushiBarContracts.BindingModel;
 using SushiBarContracts.ViewModels;
 using SushiBarDataModels;
+using System.Runtime.Serialization;
 using System.Xml.Linq;
 
 namespace SushiBarFileImplement.Models
 {
+    [DataContract]
     public class MessageInfo : IMessageInfoModel
     {
+        [DataMember]
         public string MessageId { get; set; } = string.Empty;
 
+        [DataMember]
         public int? ClientId { get; set; }
 
+        [DataMember]
         public string SenderName { get; set; } = string.Empty;
 
+        [DataMember]
         public DateTime DateDelivery { get; set; } = DateTime.Now;
 
+        [DataMember]
         public string Subject { get; set; } = string.Empty;
 
+        [DataMember]
         public string Body { get; set; } = string.Empty;
 
         public static MessageInfo? Create(MessageInfoBindingModel model)

SushiBarFileImplement/Models/Order.cs

@@ -2,20 +2,39 @@
 using SushiBarContracts.ViewModels;
 using SushiBarDataModels;
 using SushiBarDataModels.Enums;
+using System.Runtime.Serialization;
 using System.Xml.Linq;
 
 namespace SushiBarFileImplement.Models
 {
+    [DataContract]
     public class Order : IOrderModel
     {
+        [DataMember]
         public int Id { get; private set; }
+
+        [DataMember]
         public int SushiId { get; private set; }
+
+        [DataMember]
         public int ClientId { get; private set; }
+
+        [DataMember]
         public int? ImplementerId { get; private set; }
+
+        [DataMember]
         public int Count { get; private set; }
+
+        [DataMember]
         public double Sum { get; private set; }
+
+        [DataMember]
         public OrderStatus Status { get; private set; } = OrderStatus.Неизвестен;
+
+        [DataMember]
         public DateTime DateCreate { get; private set; } = DateTime.Now;
+
+        [DataMember]
         public DateTime? DateImplement { get; private set; }
         public static Order? Create(OrderBindingModel? model)
         {

SushiBarFileImplement/Models/Sushi.cs

@@ -1,18 +1,27 @@
 using SushiBarContracts.BindingModel;
 using SushiBarContracts.ViewModels;
 using SushiBarDataModels.Models;
+using System.Runtime.Serialization;
 using System.Xml.Linq;
 
 namespace SushiBarFileImplement.Models
 {
+    [DataContract]
     public class Sushi : ISushiModel
     {
+        [DataMember]
         public int Id { get; private set; }
+
+        [DataMember]
         public string SushiName { get; private set; } = string.Empty;
+
+        [DataMember]
         public double Price { get; private set; }
         public Dictionary<int, int> Components { get; private set; } = new();
 
         private Dictionary<int, (IComponentModel, int)>? _sushiComponents = null;
+
+        [DataMember]
         public Dictionary<int, (IComponentModel, int)> SushiComponents
         {
             get