diff --git a/ComputersShop/ComputersShopDataBaseImplement/Models/Client.cs b/ComputersShop/ComputersShopDataBaseImplement/Models/Client.cs
index 825ff80..2887e2b 100644
--- a/ComputersShop/ComputersShopDataBaseImplement/Models/Client.cs
+++ b/ComputersShop/ComputersShopDataBaseImplement/Models/Client.cs
@@ -8,20 +8,25 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Runtime.Serialization;
 
 namespace ComputersShopDataBaseImplement.Models
 {
+	[DataContract]
 	public class Client : IClientModel
 	{
 		[Required]
+		[DataMember]
 		public string ClientFIO { get; set; } = string.Empty;
 
 		[Required]
+		[DataMember]
 		public string Email { get; set; } = string.Empty;
 
 		[Required]
+		[DataMember]
 		public string Password { get; set; } = string.Empty;
-
+		[DataMember]
 		public int Id { get; set; }
 
 		[ForeignKey("ClientId")]
diff --git a/ComputersShop/ComputersShopDataBaseImplement/Models/Component.cs b/ComputersShop/ComputersShopDataBaseImplement/Models/Component.cs
index 2f4742a..384d8dd 100644
--- a/ComputersShop/ComputersShopDataBaseImplement/Models/Component.cs
+++ b/ComputersShop/ComputersShopDataBaseImplement/Models/Component.cs
@@ -9,16 +9,21 @@ using System.Text;
 using System.Threading.Tasks;
 using ComputersShopContracts.BindingModels;
 using ComputersShopContracts.ViewModels;
+using System.Runtime.Serialization;
 
 namespace ComputersShopDataBaseImplement.Models
 {
-    public class Component : IComponentModel
+	[DataContract]
+	public class Component : IComponentModel
     {
+		[DataMember]
         public int Id { get; private set; }
         [Required]
-        public string ComponentName { get; private set; } = string.Empty;
+		[DataMember]
+		public string ComponentName { get; private set; } = string.Empty;
         [Required]
-        public double Cost { get; set; }
+		[DataMember]
+		public double Cost { get; set; }
         [ForeignKey("ComponentId")]
         public virtual List<ComputerComponent> ComputerComponents { get; set; } = new();
         public static Component? Create(ComponentBindingModel model)
diff --git a/ComputersShop/ComputersShopDataBaseImplement/Models/Computer.cs b/ComputersShop/ComputersShopDataBaseImplement/Models/Computer.cs
index 60b02b3..b739985 100644
--- a/ComputersShop/ComputersShopDataBaseImplement/Models/Computer.cs
+++ b/ComputersShop/ComputersShopDataBaseImplement/Models/Computer.cs
@@ -8,16 +8,21 @@ using System.Text;
 using System.Threading.Tasks;
 using ComputersShopContracts.BindingModels;
 using ComputersShopContracts.ViewModels;
+using System.Runtime.Serialization;
 
 namespace ComputersShopDataBaseImplement.Models
 {
+    [DataContract]
     public class Computer : IComputerModel
     {
-        public int Id { get; set; }
+		[DataMember]
+		public int Id { get; set; }
         [Required]
-        public string ComputerName { get; set; } = string.Empty;
+		[DataMember]
+		public string ComputerName { get; set; } = string.Empty;
         [Required]
-        public double Price { get; set; }
+		[DataMember]
+		public double Price { get; set; }
         private Dictionary<int, (IComponentModel, int)>? _ComputerComponents = null;
         [NotMapped]
         public Dictionary<int, (IComponentModel, int)> ComputerComponents
diff --git a/ComputersShop/ComputersShopDataBaseImplement/Models/Implementer.cs b/ComputersShop/ComputersShopDataBaseImplement/Models/Implementer.cs
index ade0055..158074e 100644
--- a/ComputersShop/ComputersShopDataBaseImplement/Models/Implementer.cs
+++ b/ComputersShop/ComputersShopDataBaseImplement/Models/Implementer.cs
@@ -8,24 +8,31 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Runtime.Serialization;
 
 namespace ComputersShopDataBaseImplement.Models
 {
+    [DataContract]
     public class Implementer : IImplementerModel
     {
-        public int Id { get; set; }
+		[DataMember]
+		public int Id { get; set; }
 
         [Required]
-        public string ImplementerFIO { get; set; } = string.Empty;
+		[DataMember]
+		public string ImplementerFIO { get; set; } = string.Empty;
 
         [Required]
-        public string Password { get; set; } = string.Empty;
+		[DataMember]
+		public string Password { get; set; } = string.Empty;
 
         [Required]
-        public int WorkExperience { get; set; }
+		[DataMember]
+		public int WorkExperience { get; set; }
 
         [Required]
-        public int Qualification { get; set; }
+		[DataMember]
+		public int Qualification { get; set; }
 
         [ForeignKey("ImplementerId")]
         public virtual List<Order> Orders { get; set; } = new();
diff --git a/ComputersShop/ComputersShopDataBaseImplement/Models/Message.cs b/ComputersShop/ComputersShopDataBaseImplement/Models/Message.cs
index 28e78c7..b05f9ec 100644
--- a/ComputersShop/ComputersShopDataBaseImplement/Models/Message.cs
+++ b/ComputersShop/ComputersShopDataBaseImplement/Models/Message.cs
@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
+using System.Runtime.Serialization;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -13,7 +14,8 @@ namespace ComputersShopDataBaseImplement.Models
     public class Message : IMessageInfoModel
     {
         [Key]
-        public string MessageId { get; private set; } = string.Empty;
+		[DataMember]
+		public string MessageId { get; private set; } = string.Empty;
 
         public int? ClientId { get; private set; }
 
diff --git a/ComputersShop/ComputersShopDataBaseImplement/Models/Order.cs b/ComputersShop/ComputersShopDataBaseImplement/Models/Order.cs
index 48c9fe8..925712f 100644
--- a/ComputersShop/ComputersShopDataBaseImplement/Models/Order.cs
+++ b/ComputersShop/ComputersShopDataBaseImplement/Models/Order.cs
@@ -7,27 +7,36 @@ using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Reflection.Metadata;
+using System.Runtime.Serialization;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace ComputersShopDataBaseImplement.Models
 {
+	[DataContract]
 	public class Order : IOrderModel
 	{
 		[Required]
+		[DataMember]
 		public int ComputerId { get; set; }
 		[Required]
+		[DataMember]
 		public int ClientId { get; private set; }
-        public int? ImplementerId { get; set; }
+		[DataMember]
+		public int? ImplementerId { get; set; }
         [Required]
+		[DataMember]
 		public int Count { get; set; }
 		[Required]
+		[DataMember]
 		public double Sum { get; set; }
 		[Required]
+		[DataMember]
 		public OrderStatus Status { get; set; }
 		[Required]
+		[DataMember]
 		public DateTime DateCreate { get; set; }
-
+		[DataMember]
 		public DateTime? DateImplement { get; set; }
 		public virtual Computer Computer { get; set; }
 		public virtual Client Client { get; set; }
diff --git a/ComputersShop/ComputersShopFileImplement/Models/Client.cs b/ComputersShop/ComputersShopFileImplement/Models/Client.cs
index 3e3b617..2d56c82 100644
--- a/ComputersShop/ComputersShopFileImplement/Models/Client.cs
+++ b/ComputersShop/ComputersShopFileImplement/Models/Client.cs
@@ -4,20 +4,23 @@ using ComputersShopDataModels.Models;
 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 ComputersShopFileImplement.Models
 {
+	[DataContract]
 	public class Client : IClientModel
 	{
+		[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;
-
+		[DataMember]
 		public int Id { get; private set; }
 
 		public static Client? Create(ClientBindingModel model)
diff --git a/ComputersShop/ComputersShopFileImplement/Models/Component.cs b/ComputersShop/ComputersShopFileImplement/Models/Component.cs
index c25e38b..d70c09c 100644
--- a/ComputersShop/ComputersShopFileImplement/Models/Component.cs
+++ b/ComputersShop/ComputersShopFileImplement/Models/Component.cs
@@ -4,16 +4,21 @@ using ComputersShopDataModels.Models;
 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 ComputersShopFileImplement.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)
 		{
diff --git a/ComputersShop/ComputersShopFileImplement/Models/Computer.cs b/ComputersShop/ComputersShopFileImplement/Models/Computer.cs
index 5854244..76fab49 100644
--- a/ComputersShop/ComputersShopFileImplement/Models/Computer.cs
+++ b/ComputersShop/ComputersShopFileImplement/Models/Computer.cs
@@ -4,16 +4,21 @@ using ComputersShopDataModels.Models;
 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 ComputersShopFileImplement.Models
 {
+	[DataContract]
 	public class Computer : IComputerModel
 	{
+		[DataMember]
 		public int Id { get; private set; }
+		[DataMember]
 		public string ComputerName { 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)>? _ComputerComponents = null;
diff --git a/ComputersShop/ComputersShopFileImplement/Models/Implementer.cs b/ComputersShop/ComputersShopFileImplement/Models/Implementer.cs
index a777a6f..9754e0a 100644
--- a/ComputersShop/ComputersShopFileImplement/Models/Implementer.cs
+++ b/ComputersShop/ComputersShopFileImplement/Models/Implementer.cs
@@ -4,23 +4,26 @@ using ComputersShopDataModels.Models;
 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 ComputersShopFileImplement.Models
 {
+    [DataContract]
     public class Implementer : IImplementerModel
     {
+        [DataMember]
         public string ImplementerFIO { get; set; } = string.Empty;
-
+        [DataMember]
         public string Password { get; set; } = string.Empty;
-
-        public int WorkExperience { get; set; }
-
-        public int Qualification { get; set; }
-
-        public int Id { get; set; }
+		[DataMember]
+		public int WorkExperience { get; set; }
+		[DataMember]
+		public int Qualification { get; set; }
+		[DataMember]
+		public int Id { get; set; }
 
         public static Implementer? Create(ImplementerBindingModel? model)
         {
diff --git a/ComputersShop/ComputersShopFileImplement/Models/Message.cs b/ComputersShop/ComputersShopFileImplement/Models/Message.cs
index 5a2676d..ea82bff 100644
--- a/ComputersShop/ComputersShopFileImplement/Models/Message.cs
+++ b/ComputersShop/ComputersShopFileImplement/Models/Message.cs
@@ -4,24 +4,27 @@ using ComputersShopDataModels.Models;
 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 ComputersShopFileImplement.Models
 {
+	[DataContract]
 	public class Message : IMessageInfoModel
 	{
+		[DataMember]
 		public string MessageId { get; private set; } = string.Empty;
-
+		[DataMember]
 		public int? ClientId { get; private set; }
-
+		[DataMember]
 		public string SenderName { get; private set; } = string.Empty;
-
+		[DataMember]
 		public DateTime DateDelivery { get; private set; } = DateTime.Now;
-
+		[DataMember]
 		public string Subject { get; private set; } = string.Empty;
-
+		[DataMember]
 		public string Body { get; private set; } = string.Empty;
 
 		public int Id => throw new NotImplementedException();
diff --git a/ComputersShop/ComputersShopFileImplement/Models/Order.cs b/ComputersShop/ComputersShopFileImplement/Models/Order.cs
index e92d75e..222bb70 100644
--- a/ComputersShop/ComputersShopFileImplement/Models/Order.cs
+++ b/ComputersShop/ComputersShopFileImplement/Models/Order.cs
@@ -5,30 +5,33 @@ using ComputersShopDataModels.Models;
 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 ComputersShopFileImplement.Models
 {
+	[DataContract]
 	public class Order : IOrderModel
 	{
+		[DataMember]
 		public int ComputerId { get; private set; }
-
+		[DataMember]
 		public int ClientId { get; set; }
-
-        public int? ImplementerId { get; private set; }
-
-        public int Count { 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.SpecifyKind(DateTime.Now, DateTimeKind.Utc);
-
+		[DataMember]
 		public DateTime? DateImplement { get; private set; }
-
+		[DataMember]
 		public int Id { get; private set; }
 
 		public static Order? Create(OrderBindingModel? model)