diff --git a/PlumbingRepair/PlumbingRepairContracts/BindingModels/ShopBindingModel.cs b/PlumbingRepair/PlumbingRepairContracts/BindingModels/ShopBindingModel.cs
index 37d3ea7..670d0fd 100644
--- a/PlumbingRepair/PlumbingRepairContracts/BindingModels/ShopBindingModel.cs
+++ b/PlumbingRepair/PlumbingRepairContracts/BindingModels/ShopBindingModel.cs
@@ -8,8 +8,8 @@ using System.Threading.Tasks;
 
 namespace PlumbingRepairContracts.BindingModels
 {
-    public class ShopBindingModel
-    {
+    public class ShopBindingModel : IShopModel
+	{
         public int Id { get; set; }
 
         public string ShopName { get; set; } =string.Empty;
diff --git a/PlumbingRepair/PlumbingRepairContracts/ViewModels/ShopViewModel.cs b/PlumbingRepair/PlumbingRepairContracts/ViewModels/ShopViewModel.cs
index e19d1e0..3b819cd 100644
--- a/PlumbingRepair/PlumbingRepairContracts/ViewModels/ShopViewModel.cs
+++ b/PlumbingRepair/PlumbingRepairContracts/ViewModels/ShopViewModel.cs
@@ -4,8 +4,8 @@ using System.ComponentModel;
 
 namespace PlumbingRepairContracts.ViewModels
 {
-    public class ShopViewModel
-    {
+    public class ShopViewModel : IShopModel
+	{
 		[Column(visible: false)]
 		public int Id { get; set; }
 
diff --git a/PlumbingRepair/PlumbingRepairDataModels/Models/IShopModel.cs b/PlumbingRepair/PlumbingRepairDataModels/Models/IShopModel.cs
index 55197c1..a94b714 100644
--- a/PlumbingRepair/PlumbingRepairDataModels/Models/IShopModel.cs
+++ b/PlumbingRepair/PlumbingRepairDataModels/Models/IShopModel.cs
@@ -1,6 +1,6 @@
 namespace PlumbingRepairDataModels.Models
 {
-    public class IShopModel
+    public interface IShopModel: IId
     {
         string ShopName { get; }
 
diff --git a/PlumbingRepair/PlumbingRepairDatabaseImplement/Models/Shop.cs b/PlumbingRepair/PlumbingRepairDatabaseImplement/Models/Shop.cs
index d6a3209..508258e 100644
--- a/PlumbingRepair/PlumbingRepairDatabaseImplement/Models/Shop.cs
+++ b/PlumbingRepair/PlumbingRepairDatabaseImplement/Models/Shop.cs
@@ -9,8 +9,8 @@ using System.Runtime.Serialization;
 namespace PlumbingRepairDatabaseImplement.Models
 {
 	[DataContract]
-	public class Shop
-    {
+	public class Shop : IShopModel
+	{
 		[DataMember]
 		public int Id { get; set; }