diff --git a/Mango.Nop.Core/Dtos/CustomerDto.cs b/Mango.Nop.Core/Dtos/CustomerDto.cs
index fa47686..8888248 100644
--- a/Mango.Nop.Core/Dtos/CustomerDto.cs
+++ b/Mango.Nop.Core/Dtos/CustomerDto.cs
@@ -12,6 +12,7 @@ public class CustomerDto : ModelDtoBase<Customer>, ISoftDeletedEntity
 
     public string FullName => $"{LastName} {FirstName}";
 
+    public int RegisteredInStoreId { get; set; }
     public bool Deleted { get; set; }
 
     public CustomerDto() :base()
@@ -31,6 +32,7 @@ public class CustomerDto : ModelDtoBase<Customer>, ISoftDeletedEntity
         entity.FirstName = FirstName;
         entity.LastName = LastName;
         entity.Email = Email;
+        entity.RegisteredInStoreId = RegisteredInStoreId;
 
         entity.Deleted = Deleted;
     }
@@ -43,6 +45,7 @@ public class CustomerDto : ModelDtoBase<Customer>, ISoftDeletedEntity
         FirstName = entity.FirstName;
         LastName = entity.LastName;
         Email = entity.Email;
+        RegisteredInStoreId = entity.RegisteredInStoreId;
 
         Deleted = entity.Deleted;
     }
diff --git a/Mango.Nop.Core/Dtos/MgGenericAttributeDto.cs b/Mango.Nop.Core/Dtos/MgGenericAttributeDto.cs
new file mode 100644
index 0000000..1b636d7
--- /dev/null
+++ b/Mango.Nop.Core/Dtos/MgGenericAttributeDto.cs
@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AyCode.Interfaces.Entities;
+using Nop.Core.Domain.Common;
+
+namespace Mango.Nop.Core.Dtos
+{
+    public interface IGenericAttributeDto : IModelDtoBase<GenericAttribute>
+    {
+        public int EntityId { get; set; }
+        public string KeyGroup { get; set; }
+        public string Key { get; set; }
+        public string Value { get; set; }
+        public int StoreId { get; set; }
+        public DateTime? CreatedOrUpdatedDateUTC { get; set; }
+    }
+
+    public abstract class MgGenericAttributeDto : GenericAttribute, IGenericAttributeDto
+    {
+        public GenericAttribute CreateMainEntity()
+        {
+            var mainEntity = Activator.CreateInstance<GenericAttribute>();
+            CopyDtoValuesToEntity(mainEntity);
+
+            mainEntity.CreatedOrUpdatedDateUTC = DateTime.UtcNow;
+            return mainEntity;
+        }
+
+        public void CopyDtoValuesToEntity(GenericAttribute entity)
+        {
+            entity.Id = Id;
+            entity.Key = Key;
+            entity.Value = Value;
+            entity.EntityId = EntityId;
+            entity.KeyGroup = KeyGroup;
+            entity.StoreId = StoreId;
+            entity.CreatedOrUpdatedDateUTC = CreatedOrUpdatedDateUTC;
+        }
+
+        public void CopyEntityValuesToDto(GenericAttribute entity)
+        {
+            Id = entity.Id;
+            Key = entity.Key;
+            Value = entity.Value;
+            EntityId = entity.EntityId;
+            KeyGroup = entity.KeyGroup;
+            StoreId = entity.StoreId;
+            CreatedOrUpdatedDateUTC = entity.CreatedOrUpdatedDateUTC;
+        }
+    }
+}
diff --git a/Mango.Nop.Core/Extensions/GenericAttributeExtensions.cs b/Mango.Nop.Core/Extensions/GenericAttributeExtensions.cs
index beebc44..652fba2 100644
--- a/Mango.Nop.Core/Extensions/GenericAttributeExtensions.cs
+++ b/Mango.Nop.Core/Extensions/GenericAttributeExtensions.cs
@@ -1,7 +1,10 @@
-using AyCode.Utils.Extensions;
+using System;
+using System.Collections.Generic;
+using AyCode.Utils.Extensions;
 using Mango.Nop.Core.Utils;
 using Nop.Core.Domain.Common;
 using System.Diagnostics.CodeAnalysis;
+using System.Linq;
 
 namespace Mango.Nop.Core.Extensions;
 
@@ -31,4 +34,20 @@ public static class GenericAttributeExtensions
         value = CommonHelper2.To<TValue>(gaValue);
         return true;
     }
+
+    public static GenericAttribute AddNewGenericAttribute(this ICollection<GenericAttribute> src, string keyGroup, string key, string value, int entityId, int storeId)
+    {
+        var ga = new GenericAttribute
+        {
+            KeyGroup = keyGroup,
+            Key = key,
+            Value = value,
+            EntityId = entityId,
+            StoreId = storeId,
+            CreatedOrUpdatedDateUTC = DateTime.UtcNow
+        };
+
+        src.Add(ga);
+        return ga;
+    }
 }
\ No newline at end of file
diff --git a/Mango.Nop.Core/Interfaces/ForeignKeys/ICustomerForeignKey.cs b/Mango.Nop.Core/Interfaces/ForeignKeys/ICustomerForeignKey.cs
new file mode 100644
index 0000000..1a0144f
--- /dev/null
+++ b/Mango.Nop.Core/Interfaces/ForeignKeys/ICustomerForeignKey.cs
@@ -0,0 +1,9 @@
+using AyCode.Core.Interfaces;
+using AyCode.Interfaces;
+
+namespace Mango.Nop.Core.Interfaces.ForeignKeys;
+
+public interface ICustomerForeignKey : IForeignKey
+{
+    int CustomerId { get; set; }
+}
\ No newline at end of file
diff --git a/Mango.Nop.Core/Interfaces/ForeignKeys/IGenericAttributeForeignCollection.cs b/Mango.Nop.Core/Interfaces/ForeignKeys/IGenericAttributeForeignCollection.cs
new file mode 100644
index 0000000..480dcba
--- /dev/null
+++ b/Mango.Nop.Core/Interfaces/ForeignKeys/IGenericAttributeForeignCollection.cs
@@ -0,0 +1,14 @@
+using System.Collections.Generic;
+using AyCode.Core.Interfaces;
+using Nop.Core.Domain.Common;
+
+namespace Mango.Nop.Core.Interfaces.ForeignKeys;
+
+public interface IGenericAttributeForeignList : IGenericAttributeForeignCollection<List<GenericAttribute>>
+{
+}
+
+public interface IGenericAttributeForeignCollection<T> : IForeignCollection<T> where T : IEnumerable<GenericAttribute>
+{
+    T GenericAttributes { get; }
+}
\ No newline at end of file