diff --git a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Entity.cs b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Entity.cs
index adf991ab4e..c96e305d45 100644
--- a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Entity.cs
+++ b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Entity.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Reflection;
 using Volo.Abp.MultiTenancy;
 
@@ -11,8 +12,10 @@ namespace Volo.Abp.Domain.Entities
         /// <inheritdoc/>
         public override string ToString()
         {
-            return $"[ENTITY: {GetType().Name}]";
+            return $"[ENTITY: {GetType().Name}] Keys = {GetKeys().JoinAsString(", ")}";
         }
+
+        public abstract object[] GetKeys();
     }
 
     /// <inheritdoc cref="IEntity{TKey}" />
@@ -97,6 +100,11 @@ namespace Volo.Abp.Domain.Entities
             return !(left == right);
         }
 
+        public override object[] GetKeys()
+        {
+            return new object[] {Id};
+        }
+
         /// <inheritdoc/>
         public override string ToString()
         {
diff --git a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/IEntity.cs b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/IEntity.cs
index f0d3410eb7..8afbabb26e 100644
--- a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/IEntity.cs
+++ b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/IEntity.cs
@@ -6,7 +6,7 @@
     /// </summary>
     public interface IEntity
     {
-
+        object[] GetKeys();
     }
 
     /// <summary>
diff --git a/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Repositories/RepositoryRegistration_Tests.cs b/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Repositories/RepositoryRegistration_Tests.cs
index 8f28c9da67..0e9cb4f8b5 100644
--- a/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Repositories/RepositoryRegistration_Tests.cs
+++ b/framework/test/Volo.Abp.Ddd.Tests/Volo/Abp/Domain/Repositories/RepositoryRegistration_Tests.cs
@@ -230,6 +230,10 @@ namespace Volo.Abp.Domain.Repositories
         public class MyTestAggregateRootWithoutPk : AggregateRoot
         {
             public string MyId { get; set; }
+            public override object[] GetKeys()
+            {
+                return new object[] {MyId};
+            }
         }
 
         public class MyTestDefaultRepository<TEntity> : RepositoryBase<TEntity>
diff --git a/framework/test/Volo.Abp.EntityFrameworkCore.Tests.SecondContext/Volo/Abp/EntityFrameworkCore/TestApp/SecondContext/PhoneInSecondDbContext.cs b/framework/test/Volo.Abp.EntityFrameworkCore.Tests.SecondContext/Volo/Abp/EntityFrameworkCore/TestApp/SecondContext/PhoneInSecondDbContext.cs
index 568c8b6ba2..aadfe3d1e7 100644
--- a/framework/test/Volo.Abp.EntityFrameworkCore.Tests.SecondContext/Volo/Abp/EntityFrameworkCore/TestApp/SecondContext/PhoneInSecondDbContext.cs
+++ b/framework/test/Volo.Abp.EntityFrameworkCore.Tests.SecondContext/Volo/Abp/EntityFrameworkCore/TestApp/SecondContext/PhoneInSecondDbContext.cs
@@ -10,5 +10,10 @@ namespace Volo.Abp.EntityFrameworkCore.TestApp.SecondContext
         public virtual Guid PersonId { get; set; }
 
         public virtual string Number { get; set; }
+
+        public override object[] GetKeys()
+        {
+            return new object[] {PersonId, Number};
+        }
     }
 }
\ No newline at end of file
diff --git a/framework/test/Volo.Abp.EventBus.Tests/Volo/Abp/EventBus/EventBus_MultipleHandle_Test.cs b/framework/test/Volo.Abp.EventBus.Tests/Volo/Abp/EventBus/EventBus_MultipleHandle_Test.cs
index 78df6a6b40..6892891f90 100644
--- a/framework/test/Volo.Abp.EventBus.Tests/Volo/Abp/EventBus/EventBus_MultipleHandle_Test.cs
+++ b/framework/test/Volo.Abp.EventBus.Tests/Volo/Abp/EventBus/EventBus_MultipleHandle_Test.cs
@@ -24,7 +24,10 @@ namespace Volo.Abp.EventBus
 
         public class MyEntity : Entity
         {
-            
+            public override object[] GetKeys()
+            {
+                return new object[0];
+            }
         }
 
         public class MyEventHandler :
diff --git a/framework/test/Volo.Abp.TestApp/Volo/Abp/TestApp/Domain/Phone.cs b/framework/test/Volo.Abp.TestApp/Volo/Abp/TestApp/Domain/Phone.cs
index 142e97463e..e53f2bc2e3 100644
--- a/framework/test/Volo.Abp.TestApp/Volo/Abp/TestApp/Domain/Phone.cs
+++ b/framework/test/Volo.Abp.TestApp/Volo/Abp/TestApp/Domain/Phone.cs
@@ -26,6 +26,11 @@ namespace Volo.Abp.TestApp.Domain
             Number = number;
             Type = type;
         }
+
+        public override object[] GetKeys()
+        {
+            return new object[] {PersonId, Number};
+        }
     }
 
     public class Order : AggregateRoot<Guid>
@@ -96,5 +101,10 @@ namespace Volo.Abp.TestApp.Domain
         {
             Count = newCount;
         }
+
+        public override object[] GetKeys()
+        {
+            return new object[] {OrderId, ProductId};
+        }
     }
 }
\ No newline at end of file
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserLogin.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserLogin.cs
index f0747708e6..c9e76ff97d 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserLogin.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserLogin.cs
@@ -72,5 +72,10 @@ namespace Volo.Abp.Identity
         {
             return new UserLoginInfo(LoginProvider, ProviderKey, ProviderDisplayName);
         }
+
+        public override object[] GetKeys()
+        {
+            return new object[] {UserId, LoginProvider};
+        }
     }
 }
\ No newline at end of file
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserRole.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserRole.cs
index d684bded4e..88fe6a594f 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserRole.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserRole.cs
@@ -32,5 +32,10 @@ namespace Volo.Abp.Identity
             RoleId = roleId;
             TenantId = tenantId;
         }
+
+        public override object[] GetKeys()
+        {
+            return new object[] { UserId, RoleId };
+        }
     }
 }
\ No newline at end of file
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserToken.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserToken.cs
index 8950d47e28..0431a533b4 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserToken.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserToken.cs
@@ -53,5 +53,10 @@ namespace Volo.Abp.Identity
             Value = value;
             TenantId = tenantId;
         }
+
+        public override object[] GetKeys()
+        {
+            return new object[] { UserId, LoginProvider, Name };
+        }
     }
 }
\ No newline at end of file